TWI666817B - Lithium Ion Battery - Google Patents

Lithium Ion Battery Download PDF

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TWI666817B
TWI666817B TW106100958A TW106100958A TWI666817B TW I666817 B TWI666817 B TW I666817B TW 106100958 A TW106100958 A TW 106100958A TW 106100958 A TW106100958 A TW 106100958A TW I666817 B TWI666817 B TW I666817B
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material layer
carbon material
layer
lithium
ion battery
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TW106100958A
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TW201826602A (en
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宋健民
刘建设
王适
王海超
汪曙光
臧波
林逸樵
林弘正
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河南烯碳合成材料有限公司
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

一種鋰離子電池，包括一正電極、一負電極及一隔離膜，該正電極包括一第一集流器、一正電極活性材料層及一設置於該第一集流器與該正電極活性材料層之間的第一碳材料層；該負電極包括一第二集流器、一負電極活性材料層及一設置於該第二集流器與該負電極活性材料層之間的第二碳材料層，該隔離膜夾設於該正電極與該負電極之間，其中，該第一碳材料層和該第二碳材料層分別為一石墨烯層，該石墨烯層具有一La介於1μm至50μm之間的直徑以及一介於1至10之間的層數，其中La係為一由拉曼光譜所獲得之值。A lithium ion battery includes a positive electrode, a negative electrode, and an isolation film. The positive electrode includes a first current collector, a positive electrode active material layer, and an active device disposed on the first current collector and the positive electrode. A first carbon material layer between the material layers; the negative electrode includes a second current collector, a negative electrode active material layer, and a second electrode disposed between the second current collector and the negative electrode active material layer A carbon material layer, the isolation film is sandwiched between the positive electrode and the negative electrode, wherein the first carbon material layer and the second carbon material layer are respectively a graphene layer, and the graphene layer has a La interposer A diameter between 1 μm and 50 μm and a number of layers between 1 and 10, where La is a value obtained from a Raman spectrum.

Description

鋰離子電池Lithium Ion Battery

本發明有關一種鋰離子電池，尤指一種快速充電且儲電量提升的鋰離子電池。The present invention relates to a lithium-ion battery, and more particularly to a lithium-ion battery that can be quickly charged and has an increased storage capacity.

隨著科技進步以及環保意識提升，二次電池廣泛地應用於各種領域，例如電動車、移動式電子裝置或航太裝置，以現況來說，二次電池的儲電量未滿足市場所需，因此許多電池廠商極力發展高儲電量的二次電池以解決現有問題。With the advancement of science and technology and the promotion of environmental protection awareness, secondary batteries are widely used in various fields, such as electric vehicles, mobile electronic devices or aerospace devices. At present, the storage capacity of secondary batteries does not meet the market demand, so Many battery manufacturers are striving to develop high-capacity secondary batteries to solve existing problems.

如中華民國發明專利公告第I474543號提出一種鋰電池，包括一隔離層、一正極結構以及一負極結構，該隔離層具有一第一表面與相對於該第一表面之一第二表面，該正極結構設置於該第一表面，具有一正極層與一正極集電層，該正極層之二側分別連接於該第一表面與該正極集電層，該負極結構設置於該第二表面，具有一負極層與一負極集電層，該負極層之二側分別連接於該第二表面與該負極集電層，其中該正極集電層及/或該負極集電層之材質主要係由一第一碳材與一第二碳材所構成，該第一碳材之比表面積與該第二碳材之比表面積的比值係在2至300之範圍中，於該正極集電層及/或該負極集電層中，該第一碳材與該第二碳材之重量比係在2：1至1：1之範圍，該第一碳材與該第二碳材係為石墨粉。For example, the Republic of China Invention Patent Publication No. I474543 proposes a lithium battery including an isolation layer, a positive electrode structure, and a negative electrode structure. The isolation layer has a first surface and a second surface opposite to the first surface. The positive electrode The structure is disposed on the first surface and has a positive electrode layer and a positive electrode current collecting layer. Two sides of the positive electrode layer are respectively connected to the first surface and the positive electrode current collecting layer. The negative electrode structure is disposed on the second surface and has A negative electrode layer and a negative electrode current collecting layer. Two sides of the negative electrode layer are respectively connected to the second surface and the negative electrode current collecting layer. The material of the positive electrode current collecting layer and / or the negative electrode current collecting layer is mainly composed of a The first carbon material is composed of a second carbon material, and the ratio of the specific surface area of the first carbon material to the specific surface area of the second carbon material is in the range of 2 to 300 in the positive electrode current collecting layer and / or In the negative electrode current collecting layer, a weight ratio of the first carbon material to the second carbon material is in a range of 2: 1 to 1: 1, and the first carbon material and the second carbon material are graphite powder.

於以上先前技術之中，該正極集電層與該正極層彼此間以及該負極集電層與該負極層彼此間的導電性仍有改善之空間，以提升鋰離子電池的電特性。In the above prior art, there is still room for improvement in the conductivity between the positive electrode current collecting layer and the positive electrode layer and between the negative electrode current collecting layer and the negative electrode layer to improve the electrical characteristics of the lithium ion battery.

本發明的主要目的，在於解決習知鋰電池之儲電量不足、且充電速度緩慢的問題。The main purpose of the present invention is to solve the problems of insufficient storage capacity and slow charging speed of conventional lithium batteries.

為達上述目的，本發明提供一種鋰離子電池，包括一正電極、一負電極以及一隔離膜，該正電極包括一第一集流器、一設置於該第一集流器一側的正電極活性材料層以及一設置於該第一集流器與該正電極活性材料層之間的第一碳材料層，該負電極與該正電極分離設置，包括一第二集流器、一設置於該第二集流器一側的負電極活性材料層以及一設置於該第二集流器與該負電極活性材料層之間的第二碳材料層，該隔離膜則夾設於該正電極與該負電極之間，其中，該第一碳材料層和該第二碳材料層分別為一石墨烯層，該石墨烯層各自獨立地具有一La介於1μm至50μm之間的直徑以及一介於1至10之間的層數，其中La係為一由拉曼光譜所獲得之值。To achieve the above object, the present invention provides a lithium-ion battery including a positive electrode, a negative electrode, and an isolation film. The positive electrode includes a first current collector and a positive electrode disposed on a side of the first current collector. An electrode active material layer and a first carbon material layer disposed between the first current collector and the positive electrode active material layer; the negative electrode is disposed separately from the positive electrode, and includes a second current collector, a device A negative electrode active material layer on the side of the second current collector and a second carbon material layer disposed between the second current collector and the negative electrode active material layer, and the separator is sandwiched between the positive electrode Between the electrode and the negative electrode, wherein the first carbon material layer and the second carbon material layer are respectively a graphene layer, and each of the graphene layers has a diameter of La between 1 μm and 50 μm and A number between 1 and 10, where La is a value obtained from Raman spectroscopy.

於本發明一實施例中，該正電極活性材料層包括一第一材料顆粒以及一形成於該第一材料顆粒之一表面的石墨烯殼層。In an embodiment of the present invention, the positive electrode active material layer includes a first material particle and a graphene shell layer formed on a surface of the first material particle.

於本發明又一實施例中，該第一碳材料層與該第一集流器之間更夾設一第三碳材料層；且該第二碳材料層與該第二集流器之間更夾設一第四碳材料層，其中，該第三碳材料層係透過一硼摻雜，且該第四碳材料層係透過一氮摻雜，形成一結合一鋰離子電池與一超級電容的複合式電池。In yet another embodiment of the present invention, a third carbon material layer is interposed between the first carbon material layer and the first current collector; and between the second carbon material layer and the second current collector A fourth carbon material layer is further sandwiched, wherein the third carbon material layer is doped through a boron, and the fourth carbon material layer is doped through a nitrogen to form a combination of a lithium ion battery and a super capacitor. Hybrid battery.

由以上可知，本發明相較於習知技藝可達到之功效在於：As can be seen from the above, the effects achieved by the present invention compared to the conventional techniques are:

(1) 分別於該第一集流器與該正電極活性材料層之間以及於該第二集流器與該負電極活性材料層之間設置一大面積的石墨烯層，該石墨烯層具有一La介於1μm至50μm之間的直徑(La係為一由拉曼光譜所獲得之值)，以提升該集流器與該活性材料層之間的導電性。(1) A large-area graphene layer is provided between the first current collector and the positive electrode active material layer, and between the second current collector and the negative electrode active material layer, respectively, and the graphene layer It has a diameter of La between 1 μm and 50 μm (La is a value obtained by Raman spectroscopy) to improve the conductivity between the current collector and the active material layer.

(2)由於該正電極活性材料層中的該活性材料顆粒具有該石墨烯殼層，因此可提升該活性材料顆粒的導電性，故該鋰離子電池的總儲電量提高。(2) Since the active material particles in the positive electrode active material layer have the graphene shell layer, the conductivity of the active material particles can be improved, so the total storage capacity of the lithium ion battery is increased.

(3)該鋰離子電池與該超級電容結合而形成的該複合式電池，不僅同時具備鋰離子電池儲電量高及超級電容充電快速的優點，經一摻雜物摻雜的該第三碳材料層與該第四碳材料層，可透過該摻雜物攜帶電子，進而減少電解液量，避免習知電解質可能造成的溫度過高、分布不均等問題。(3) The composite battery formed by combining the lithium ion battery with the super capacitor not only has the advantages of high storage capacity of the lithium ion battery and fast charging of the super capacitor, but also the third carbon material doped with a dopant. The layer and the fourth carbon material layer can carry electrons through the dopant, thereby reducing the amount of electrolyte, and avoiding problems such as excessive temperature and uneven distribution that may be caused by conventional electrolytes.

有關本發明的詳細說明及技術內容，現就配合圖式說明如下：The detailed description and technical contents of the present invention are described below with reference to the drawings:

請搭配參閱『圖1』、『圖2』所示，為本發明第一實施例的鋰離子電池結構示意圖，本發明為一種鋰離子電池，包括一正電極10、一負電極20以及一隔離膜30，該正電極10包括一第一集流器11、一正電極活性材料層12以及一第一碳材料層13，該第一集流器11的材質可為鋁、銅、鐵、鎳、鉑、鎢、鉬、鉭、鈮、釩、鉻、鈦、鋯或上述組合。該正電極活性材料層12設置於該第一集流器11一側，於一實施例，該正電極活性材料層12包括複數個活性材料顆粒121，該活性材料顆粒121包括一第一材料顆粒1210以及一形成於該第一材料顆粒1210之一表面的石墨烯殼層1211，該活性材料顆粒121係彼此堆疊並接觸，其中該第一材料顆粒1210可為磷酸鋰鐵、鋰鎳鈷、鋰鎳鈷錳、鈷酸鋰、鎳酸鋰、錳酸鋰或上述組合；在該第一材料顆粒1210上形成有該石墨烯殼層1211的方法並無特別限制，舉例來說，可利用一混拌造粒法將一石墨烯塗佈於該第一材料顆粒1210的該表面，接著透過一具有介於50℃至300℃之間的烘烤溫度進行烘烤而製成，此時，該第一材料顆粒1210之該表面係部分地、或完全地經該石墨烯包覆。Please refer to "Figure 1" and "Figure 2" for a schematic view of the structure of the lithium ion battery according to the first embodiment of the present invention. The present invention is a lithium ion battery including a positive electrode 10, a negative electrode 20, and an isolation electrode. Membrane 30, the positive electrode 10 includes a first current collector 11, a positive electrode active material layer 12, and a first carbon material layer 13. The material of the first current collector 11 may be aluminum, copper, iron, nickel , Platinum, tungsten, molybdenum, tantalum, niobium, vanadium, chromium, titanium, zirconium or a combination thereof. The positive electrode active material layer 12 is disposed on one side of the first current collector 11. In one embodiment, the positive electrode active material layer 12 includes a plurality of active material particles 121. The active material particles 121 include a first material particle. 1210 and a graphene shell layer 1211 formed on one surface of the first material particles 1210, the active material particles 121 are stacked and contacted with each other, wherein the first material particles 1210 may be lithium iron phosphate, lithium nickel cobalt, lithium Nickel cobalt manganese, lithium cobaltate, lithium nickelate, lithium manganate, or a combination thereof; the method of forming the graphene shell layer 1211 on the first material particles 1210 is not particularly limited, and for example, a mixture of The granulation method applies a graphene to the surface of the first material particles 1210, and then is made by baking through a baking temperature between 50 ° C and 300 ° C. At this time, the first The surface of a material particle 1210 is partially or completely coated with the graphene.

該第一碳材料層13設置於該第一集流器11與該正電極活性材料層12之間，於本發明中，該第一碳材料層13為一石墨烯層，該石墨烯層具有一La介於1μm至50μm之間的直徑以及一介於1至10之間的層數，其中La係為一由拉曼光譜所獲得之值。The first carbon material layer 13 is disposed between the first current collector 11 and the positive electrode active material layer 12. In the present invention, the first carbon material layer 13 is a graphene layer, and the graphene layer has A diameter of La between 1 μm and 50 μm and a number of layers between 1 and 10, where La is a value obtained by Raman spectroscopy.

該負電極20與該正電極10分離設置，且該負電極20包括一第二集流器21、一負電極活性材料層22以及一第二碳材料層23，該第二集流器21的材質可為鋁、銅、鐵、鎳、鉑、鎢、鉬、鉭、鈮、釩、鉻、鈦、鋯或上述組合。該負電極活性材料層22設置於該第二集流器21一側，該負電極活性材料層22可為習知適用的碳材料，於一較佳實施例中，該負電極活性材料層22亦可為包括一La介於1μm至50μm之間的直徑的碳材料(其中La係為一由拉曼光譜所獲得之值)，譬如一石墨、一石墨烯、以及其組合。該第二碳材料層23設置於該第二集流器21與該負電極活性材料層22之間，於本發明中，該第二碳材料層23為一包括1至10層的大面積石墨烯層231，該石墨烯層231具有一La介於1μm至50μm之間的直徑。The negative electrode 20 is provided separately from the positive electrode 10. The negative electrode 20 includes a second current collector 21, a negative electrode active material layer 22, and a second carbon material layer 23. The material can be aluminum, copper, iron, nickel, platinum, tungsten, molybdenum, tantalum, niobium, vanadium, chromium, titanium, zirconium or a combination thereof. The negative electrode active material layer 22 is disposed on the side of the second current collector 21. The negative electrode active material layer 22 may be a conventionally applicable carbon material. In a preferred embodiment, the negative electrode active material layer 22 It can also be a carbon material including a diameter of La between 1 μm and 50 μm (where La is a value obtained by Raman spectroscopy), such as a graphite, a graphene, and a combination thereof. The second carbon material layer 23 is disposed between the second current collector 21 and the negative electrode active material layer 22. In the present invention, the second carbon material layer 23 is a large-area graphite including 1 to 10 layers. The olefin layer 231 has a diameter of La between 1 μm and 50 μm.

請續參考『圖2』。於一實施例，該第二碳材料層23包括複數個矽顆粒232，該些矽顆粒232均與該石墨烯層231接觸，其中該矽顆粒232具有一介於10 nm至100 nm之間的粒徑，例如一以矽烯組成的球體。由於該鋰離子電池充放電的過程中，鋰離子會自由地進出該矽顆粒232，導致該矽顆粒232的體積劇烈變化，若選用較大粒徑的該矽顆粒232，會導致該矽顆粒232崩解而失去提升儲電量的效果，故本案選用相對於鋰離子較小粒徑的該矽顆粒232，可防止該矽顆粒232因劇烈的體積變化而崩解，以提升該鋰離子電池的使用壽命。Please continue to refer to "Figure 2". In one embodiment, the second carbon material layer 23 includes a plurality of silicon particles 232, all of which are in contact with the graphene layer 231. The silicon particles 232 have a particle size between 10 nm and 100 nm. Diameter, such as a sphere made of silene. During the charging and discharging of the lithium-ion battery, lithium ions can freely enter and exit the silicon particles 232, resulting in a drastic change in the volume of the silicon particles 232. If the silicon particles 232 with a larger particle size are selected, the silicon particles 232 will be caused The disintegration loses the effect of increasing the storage capacity. Therefore, the silicon particles 232 with a smaller particle size compared to lithium ions are used in this case, which can prevent the silicon particles 232 from disintegrating due to drastic volume changes, thereby improving the use of the lithium ion battery. life.

為了強化該矽顆粒232與該石墨烯層231的結合，於一實施例中，該矽顆粒232之表面以一第一包覆層233包覆，且同時該石墨烯層231以一第二包覆層234包覆。關於該第一包覆層233與該第二包覆層234的材料並無特別限制，只要該第一包覆層233與該第二包覆層234彼此之間可產生一化學鍵結而連結即可，譬如，該第一包覆層233與該第二包覆層234交聯、或者該第一包覆層233與該第二包覆層234分別攜帶相反電性而連結，然本發明並不僅限於此。In order to strengthen the combination of the silicon particles 232 and the graphene layer 231, in one embodiment, the surface of the silicon particles 232 is covered with a first coating layer 233, and at the same time, the graphene layer 231 is covered with a second coating The cover layer 234 is covered. There are no particular restrictions on the materials of the first cladding layer 233 and the second cladding layer 234, as long as the first cladding layer 233 and the second cladding layer 234 can be chemically bonded to each other, Yes, for example, the first cladding layer 233 and the second cladding layer 234 are cross-linked, or the first cladding layer 233 and the second cladding layer 234 are connected with opposite electrical properties, respectively. Not only that.

關於該第一包覆層233的材料的非限制性實例包括：具有磺酸官能基的高分子，如聚苯乙烯磺酸鈉鹽(poly(sodium 4-styrene sulfonate)、聚(2-丙烯醯胺-2-甲基丙磺酸(poly(2-acrylamido-2-methyl-1-propanesulfonic acid)；具有碳酸官能基的高分子；陽離子交換樹脂；聚乙烯醇(polyvinyl alcohol)；及/或聚丙烯酸(polyacrylic acid)或聚丙烯酸鈉鹽(poly(sodium acrylate))。至於該第二包覆層234的材料的非限制性實例包括：聚四級銨鹽；陰離子交換樹脂；聚乙烯醇(polyvinyl alcohol)；聚二丙烯基二甲基氯化銨(polydiallyldimethylammonium chloride)、十二烷基三甲基溴化銨(dodecyltrimethylammonium bromide)、聚丙烯醯胺丙基三甲基氯化銨(poly(acrylamido-N-propyl trimethyl ammonium chloride)、聚3-甲基丙醯胺丙基三甲基氯化銨(poly((3-methacryloylamino-propyl trimethylammonium chloride)、聚氫氧化氯烯丙胺(poly(allylamine hydrochloride)、聚二甲基氨基甲基氯季銨鹽(poly(dimethylaminoethylacrylate methylchloride quat)、及/或聚甲基丙烯酸二甲氨基甲基氯季銨鹽(poly(dimethylaminoethylmethacrylate methylchloride quat)。Non-limiting examples of the material of the first coating layer 233 include: a polymer having a sulfonic acid functional group, such as poly (sodium 4-styrene sulfonate), poly (2-acrylium Amine-2-methylpropanesulfonic acid (poly (2-acrylamido-2-methyl-1-propanesulfonic acid); polymer with carbonic acid functional group; cation exchange resin; polyvinyl alcohol); and / or Polyacrylic acid or poly (sodium acrylate). Non-limiting examples of the material of the second coating layer 234 include: polyquaternary ammonium salt; anion exchange resin; polyvinyl alcohol (polyvinyl alcohol); polydiallyldimethylammonium chloride, dodecyltrimethylammonium bromide, poly (acrylamido- N-propyl trimethyl ammonium chloride), poly ((3-methacryloylamino-propyl trimethylammonium chloride), poly (allylamine hydrochloride), poly (allylamine hydrochloride), Polydimethylcarbamate Chloride quaternary ammonium salt (poly (dimethylaminoethylacrylate methylchloride quat), and / or poly dimethylaminoethyl methacrylate methyl chloride quaternary (poly (dimethylaminoethylmethacrylate methylchloride quat).

為了更確保該石墨烯層231與該矽顆粒232之間的結合力，提升導電效果，進而改善該二次電池的充放電效率，在該第一包覆層233與該第二包覆層234之表面更包括一第三包覆層235，以確保該矽顆粒232有效地與該石墨烯層231之表面接觸。該第三包覆層235的材料舉例可為含碳導電膜，但本發明對此並無特別限制。In order to further ensure the bonding force between the graphene layer 231 and the silicon particles 232, improve the conductive effect, and further improve the charge and discharge efficiency of the secondary battery, the first cladding layer 233 and the second cladding layer 234 The surface further includes a third cladding layer 235 to ensure that the silicon particles 232 effectively contact the surface of the graphene layer 231. An example of the material of the third cladding layer 235 may be a carbon-containing conductive film, but the invention is not particularly limited thereto.

該隔離膜30夾設於該正電極10與該負電極20之間，該隔離膜30的材質舉例可為聚乙烯(Polyethylene，簡稱PE)、聚丙烯(Polypropylene ，簡稱PP) 、或其組合，本發明不以此為限。The isolation film 30 is sandwiched between the positive electrode 10 and the negative electrode 20. Examples of the material of the isolation film 30 may be polyethylene (PE), polypropylene (PP), or a combination thereof. The invention is not limited to this.

請搭配參閱『圖3』所示，為本發明第二實施例的鋰離子電池結構示意圖，本實施例與第一實施例差異為：除了該第一碳材料層13與該第一集流器11之間夾設一第三碳材料層14，以及該第二碳材料層23與該第二集流器21之間夾設一第四碳材料層24之外，其餘結構大致上與第一實施例的鋰離子電池相同，於此不再贅述。Please refer to [FIG. 3] for a schematic diagram of the lithium ion battery structure according to the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that except for the first carbon material layer 13 and the first current collector A third carbon material layer 14 is sandwiched between 11 and a fourth carbon material layer 24 is sandwiched between the second carbon material layer 23 and the second current collector 21. The remaining structure is substantially the same as the first The lithium-ion batteries in the embodiments are the same, and will not be repeated here.

於本發明第二實施例中，該第三碳材料層14以及該第四碳材料層24可分別獨立地選用直徑介於一由拉曼光譜所獲得之La係介於1μm至50μm之間的碳材料，該碳材料例如石墨或石墨烯，以降低電子在該第三碳材料層14或該第四碳材料層24之間傳遞時可能產生的耗損。In the second embodiment of the present invention, the third carbon material layer 14 and the fourth carbon material layer 24 can be independently selected from a La system having a diameter between 1 μm and 50 μm obtained from a Raman spectrum. A carbon material, such as graphite or graphene, to reduce the loss that may occur when electrons are transferred between the third carbon material layer 14 or the fourth carbon material layer 24.

於本發明第二實施例中，該第三碳材料層14可透過一硼摻雜而具有一正電極特性，且該第四碳材料層24可透過一氮摻雜而具有一負電極特性，如此一來，該第三碳材料層14與該第四碳材料層24可視為一超級電容的兩片集流器。換言之，本發明的第二實施例係一透過結合鋰離子電池與超級電容而形成的複合式電池。由於上述之摻雜具有吸附該鋰離子電池內之電子之特性而達到與電解液相同的效果，故該硼摻雜以及該氮摻雜可達到降低電解液用量，甚至毋須添加電解液的功效，相對地降低習知技術中電解液溫度過高可能造成的風險，以及電解液分布不均的問題。In the second embodiment of the present invention, the third carbon material layer 14 has a positive electrode characteristic through a boron doping, and the fourth carbon material layer 24 has a negative electrode characteristic through a nitrogen doping. In this way, the third carbon material layer 14 and the fourth carbon material layer 24 can be regarded as a two-piece current collector of a super capacitor. In other words, the second embodiment of the present invention is a hybrid battery formed by combining a lithium ion battery and a super capacitor. Since the above doping has the characteristics of absorbing electrons in the lithium ion battery and achieves the same effect as the electrolyte, the boron doping and the nitrogen doping can reduce the amount of the electrolyte, even without the need to add the electrolyte. Relatively reduce the risks caused by too high electrolyte temperature and the problem of uneven electrolyte distribution in the conventional technology.

綜上所述，由於本發明係分別於該第一集流器與該正電極活性材料層之間以及於該第二集流器與該負電極活性材料層之間設置大面積的該石墨烯層，以提升該集流器與該活性材料層之間的導電性；再者，由於該正電極活性材料層的該第一材料顆粒的該表面具有該石墨烯殼層，因此可提升該第一材料顆粒的導電性，故該鋰離子電池的總儲電量提高。另外，結合鋰離子電池與超級電容形成的該複合式電池，不僅同時具備鋰離子電池儲電量高及超級電容充電快速的優點，分別對該第三碳材料層與該第四碳材料層摻雜一摻雜物，而使該第三碳材料層與該第四碳材料層分別具有一正電極與一負電極特性，並透過該摻雜物攜帶電子，進而減少電解液的使用量，避免習知電解質可能造成的溫度過高、分布不均等問題。To sum up, since the present invention is arranged between the first current collector and the positive electrode active material layer and between the second current collector and the negative electrode active material layer, a large area of the graphene is provided. Layer to improve the conductivity between the current collector and the active material layer; further, since the surface of the first material particles of the positive electrode active material layer has the graphene shell layer, the first The conductivity of a material particle increases the total storage capacity of the lithium-ion battery. In addition, the composite battery formed by combining a lithium ion battery and a super capacitor not only has the advantages of high storage capacity of the lithium ion battery and fast charging of the super capacitor, but also doping the third carbon material layer and the fourth carbon material layer, respectively. A dopant, so that the third carbon material layer and the fourth carbon material layer have the characteristics of a positive electrode and a negative electrode, respectively, and carry electrons through the dopant, thereby reducing the amount of electrolyte used and avoiding habit It is known that the electrolyte may cause problems such as excessive temperature and uneven distribution.

以上已將本發明做一詳細說明，惟以上所述者，僅爲本發明的一較佳實施例而已，當不能限定本發明實施的範圍。即凡依本發明申請範圍所作的均等變化與修飾等，皆應仍屬本發明的專利涵蓋範圍內。The present invention has been described in detail above, but the above is only a preferred embodiment of the present invention, and the scope of implementation of the present invention cannot be limited. That is, all equivalent changes and modifications made in accordance with the scope of the application of the present invention should still fall within the scope of the patent of the present invention.

10‧‧‧正電極10‧‧‧Positive electrode

11‧‧‧第一集流器11‧‧‧The first current collector

12‧‧‧正電極活性材料層12‧‧‧Positive electrode active material layer

121‧‧‧活性材料顆粒121‧‧‧ active material particles

1210‧‧‧第一材料顆粒1210‧‧‧ particles of the first material

1211‧‧‧石墨烯殼層1211‧‧‧graphene shell

13‧‧‧第一碳材料層13‧‧‧First carbon material layer

14‧‧‧第三碳材料層14‧‧‧ Third carbon material layer

20‧‧‧負電極20‧‧‧ negative electrode

21‧‧‧第二集流器21‧‧‧Second current collector

22‧‧‧負電極活性材料層22‧‧‧ negative electrode active material layer

23‧‧‧第二碳材料層23‧‧‧second carbon material layer

231‧‧‧石墨烯層231‧‧‧graphene layer

232‧‧‧矽顆粒232‧‧‧Silicone

233‧‧‧第一包覆層233‧‧‧first coating

234‧‧‧第二包覆層234‧‧‧second coating

235‧‧‧第三包覆層235‧‧‧ third coating

24‧‧‧第四碳材料層24‧‧‧ Fourth carbon material layer

30‧‧‧隔離膜30‧‧‧ isolation film

『圖1』，為本發明第一實施例的鋰離子電池結構示意圖。 『圖2』，為本發明又一實施例的第二碳材料層部分結構示意圖。 『圖3』，為本發明第二實施例的鋰離子電池結構示意圖。[Fig. 1] is a schematic structural diagram of a lithium ion battery according to a first embodiment of the present invention. [Fig. 2] A schematic diagram of a partial structure of a second carbon material layer according to another embodiment of the present invention. [Figure 3] A schematic structural diagram of a lithium ion battery according to a second embodiment of the present invention.

Claims (10)

一種鋰離子電池，包括： 一正電極，包括一第一集流器、一設置於該第一集流器一側的正電極活性材料層以及一設置於該第一集流器與該正電極活性材料層之間的第一碳材料層； 一與該正電極分離設置的負電極，包括一第二集流器、一設置於該第二集流器一側的負電極活性材料層以及一設置於該第二集流器與該負電極活性材料層之間的第二碳材料層；以及 一夾設於該正電極與該負電極之間的隔離膜； 其中，該第一碳材料層和該第二碳材料層分別為一石墨烯層，該石墨烯層各自獨立地具有一La介於1μm至50μm之間的直徑以及一介於1至10之間的層數，其中La係為一由拉曼光譜所獲得之值。A lithium-ion battery includes: a positive electrode including a first current collector, a positive electrode active material layer disposed on one side of the first current collector, and a first current collector and the positive electrode A first carbon material layer between the active material layers; a negative electrode disposed separately from the positive electrode, including a second current collector, a negative electrode active material layer disposed on one side of the second current collector, and a A second carbon material layer disposed between the second current collector and the negative electrode active material layer; and an isolation film sandwiched between the positive electrode and the negative electrode; wherein the first carbon material layer And the second carbon material layer are respectively a graphene layer, and each of the graphene layers independently has a diameter of La between 1 μm and 50 μm and a number of layers between 1 and 10, where La is a Value obtained from Raman spectroscopy. 如申請專利範圍第1項所述之鋰離子電池，其中該正電極活性材料層包括複數個活性材料顆粒，該活性材料顆粒包括一第一材料顆粒以及一形成於該第一材料顆粒之一表面的石墨烯殼層。The lithium ion battery according to item 1 of the scope of patent application, wherein the positive electrode active material layer includes a plurality of active material particles, the active material particles include a first material particle and a surface formed on a surface of the first material particle Graphene shell. 如申請專利範圍第2項所述之鋰離子電池，其中該第一材料顆粒為擇自於磷酸鋰鐵、鋰鎳鈷、鋰鎳鈷錳、鈷酸鋰、鎳酸鋰、錳酸鋰、及其組合所組成的群組，且該活性材料顆粒係彼此堆疊並接觸。The lithium ion battery according to item 2 of the scope of patent application, wherein the first material particles are selected from lithium iron phosphate, lithium nickel cobalt, lithium nickel cobalt manganese, lithium cobaltate, lithium nickelate, lithium manganate, and A group consisting of combinations thereof, and the active material particles are stacked and contacted with each other. 如申請專利範圍第1項所述之鋰離子電池，其中該負電極活性材料層係包括一La介於1μm至50μm之間的直徑的碳材料，且La係為一由拉曼光譜所獲得之值。The lithium-ion battery according to item 1 of the patent application range, wherein the negative electrode active material layer includes a carbon material having a diameter between La and 1 μm to 50 μm, and La is a material obtained by Raman spectroscopy. value. 如申請專利範圍第1項所述之鋰離子電池，其中該第二碳材料層包括複數個與該石墨烯層接觸的矽顆粒，且該矽顆粒具有一介於10 nm至100 nm之間的粒徑。The lithium ion battery according to item 1 of the patent application scope, wherein the second carbon material layer includes a plurality of silicon particles in contact with the graphene layer, and the silicon particles have a particle size between 10 nm and 100 nm. path. 如申請專利範圍第5項所述之鋰離子電池，其中，該石墨烯層之表面經一第一包覆層包覆，該矽顆粒之表面經一第二包覆層包覆，且該第一包覆層與該第二包覆層彼此之間產生一化學鍵結。The lithium ion battery according to item 5 of the scope of patent application, wherein the surface of the graphene layer is covered by a first coating layer, the surface of the silicon particles is covered by a second coating layer, and the first A cladding layer and the second cladding layer generate a chemical bond with each other. 如申請專利範圍第6項所述之鋰離子電池，其中該第一包覆層與該第二包覆層之表面更經一第三包覆層包覆。The lithium-ion battery according to item 6 of the scope of the patent application, wherein the surfaces of the first coating layer and the second coating layer are further covered with a third coating layer. 如申請專利範圍第1項所述之鋰離子電池，其中，該第一碳材料層與該第一集流器之間更夾設一第三碳材料層；且該第二碳材料層與該第二集流器之間更夾設一第四碳材料層。The lithium ion battery according to item 1 of the scope of patent application, wherein a third carbon material layer is further sandwiched between the first carbon material layer and the first current collector; and the second carbon material layer and the A fourth carbon material layer is further sandwiched between the second current collectors. 如申請專利範圍第8項所述之鋰離子電池，其中該第三碳材料層係透過一硼摻雜，且該第四碳材料層係透過一氮摻雜。The lithium-ion battery according to item 8 of the scope of the patent application, wherein the third carbon material layer is doped through a boron, and the fourth carbon material layer is doped through a nitrogen. 如申請專利範圍第8項所述之鋰離子電池，其中該第三碳材料層及該第四碳材料層係分別為一La介於1μm至50μm之間的直徑的碳材料，且La係為一由拉曼光譜所獲得之值。The lithium-ion battery according to item 8 of the scope of patent application, wherein the third carbon material layer and the fourth carbon material layer are carbon materials each having a diameter between La and 1 μm to 50 μm, and La is A value obtained from Raman spectroscopy.
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