JPH01221859A - Secondary battery - Google Patents
Secondary batteryInfo
- Publication number
- JPH01221859A JPH01221859A JP63046168A JP4616888A JPH01221859A JP H01221859 A JPH01221859 A JP H01221859A JP 63046168 A JP63046168 A JP 63046168A JP 4616888 A JP4616888 A JP 4616888A JP H01221859 A JPH01221859 A JP H01221859A
- Authority
- JP
- Japan
- Prior art keywords
- coke
- active material
- negative electrode
- negative active
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000571 coke Substances 0.000 claims abstract description 43
- 239000007773 negative electrode material Substances 0.000 claims abstract description 15
- 239000011261 inert gas Substances 0.000 claims abstract description 6
- 238000005087 graphitization Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 14
- 239000012535 impurity Substances 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 7
- 239000008188 pellet Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 7
- 229910052744 lithium Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000002391 heterocyclic compounds Chemical class 0.000 description 1
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- 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
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、コークスを負極活物質としている二次電池に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a secondary battery using coke as a negative electrode active material.
本発明は、上記の様な二次電池において、粉砕された状
態において不活性ガスの気流中または真空中で且つ黒鉛
化しない温度で加熱処理されたコークスを負極活物質と
することによって、低コストであるにも拘らず良好且つ
均一なサイクル特性を有することができる様にしたもの
である。The present invention provides a secondary battery as described above, which uses coke, which has been pulverized and heat-treated in an inert gas stream or vacuum at a temperature that does not cause graphitization, as the negative electrode active material, thereby reducing cost. Despite this, it is possible to have good and uniform cycle characteristics.
二次電池としては、ニッケル・カドミウム電池や鉛電池
等が従来から汎用されている。しかしこれらの二次電池
は、容量保存性が悪く、重く、エネルギ密度も低い。As secondary batteries, nickel-cadmium batteries, lead batteries, and the like have been commonly used. However, these secondary batteries have poor capacity storage, are heavy, and have low energy density.
これに対して非水リチウム二次電池は、軽く、エネルギ
密度も高い、しかし、負極にリウチム金属を用いると、
このリウチム金属が充電時にデンドライト状またはパウ
ダ状に析出して、充放電効率が低下する。On the other hand, nonaqueous lithium secondary batteries are lightweight and have high energy density, but when lithium metal is used for the negative electrode,
This lithium metal precipitates in the form of dendrites or powder during charging, resulting in a decrease in charging and discharging efficiency.
そこで、特開昭６２−９０８６３号公報や特開昭６０−
２３５３７２号公報等にも記載されている様に、リウチ
ム金属を吸蔵する各種の活物質を負極とする二次電池が
提案されている。Therefore, JP-A-62-90863 and JP-A-60-
As described in Japanese Patent No. 235372, etc., secondary batteries using various active materials that occlude lithium metal as negative electrodes have been proposed.
そして、この様な負極活物質の中でも、低コストである
という点からコークスが有望であると考えられる。Among these negative electrode active materials, coke is considered to be promising because of its low cost.
しかし、後記する様に、コークスをそのまま負極活物質
としても、二次電池のサイクル特性が良くなく、しかも
このサイクル特性自体にばらつきがある。However, as will be described later, even if coke is used as a negative electrode active material, the cycle characteristics of the secondary battery are not good, and there are variations in the cycle characteristics themselves.
本発明による二次電池は、粉砕された状態において不活
性ガスの気流中または真空中で且つ黒鉛化しない温度で
加熱処理されたコークスを負極活物質としている。The secondary battery according to the present invention uses, as a negative electrode active material, coke that has been heat-treated in a pulverized state in an inert gas stream or in a vacuum at a temperature that does not cause graphitization.
本発明による二次電池では、低コストのコークスを負極
活物質としているが、コークスの原料中に不純物が不均
一に含まれていても、この不純物は殆ど熱処理によって
飛散しており、コークスは不純物を殆ど含んでいない。In the secondary battery according to the present invention, low-cost coke is used as the negative electrode active material, but even if impurities are unevenly contained in the coke raw material, most of these impurities are scattered by heat treatment, and the coke contains impurities. Contains almost no
また、コークスは黒鉛化していないので、このコークス
は大きな活性を有している。Moreover, since the coke is not graphitized, this coke has high activity.
以下、本発明の実施例を第１図及び第２図を参照しなが
ら説明する。Embodiments of the present invention will be described below with reference to FIGS. 1 and 2.
これらの実施例の電池は、第２図に示す様に、直径２０
ｍ■、高さ２．５鰭のコイン状である。負極ペレット２
は、後述の様に処理されたコークス９０重量部とポリプ
ロピレン粉末１０重量部とを配合し、直径１５．５ｗｓ
＋、厚さ０． ２ｍｍ、重さ３６ｍｇのペレットに成形
したものである。The cells of these examples have a diameter of 20 mm, as shown in FIG.
m■, coin-shaped with 2.5 fins in height. Negative electrode pellet 2
is a mixture of 90 parts by weight of coke treated as described below and 10 parts by weight of polypropylene powder, and a diameter of 15.5 ws.
+, thickness 0. It was molded into pellets with a diameter of 2 mm and a weight of 36 mg.
正極ペレット１は、ＬｉＣｏ０ｔ８５重量部と黒鉛１０
重量部とテフロン５重量部とを配合し、直径１５．５１
１、厚さ１．７ｍ、重さ１．１ｇのペレットに成形した
ものである。Positive electrode pellet 1 contains 85 parts by weight of LiCo0t and 10 parts by weight of graphite.
parts by weight and 5 parts by weight of Teflon, and the diameter is 15.51.
1. It was molded into a pellet with a thickness of 1.7 m and a weight of 1.1 g.
正、負極ペレット１．２は、ポリプロピレン製のセパレ
ータ３を両者間に介在させた状態で、正極ケース４ａと
負極ケース４ｂとからなるケース４に収容されている。The positive and negative electrode pellets 1.2 are housed in a case 4 consisting of a positive electrode case 4a and a negative electrode case 4b, with a polypropylene separator 3 interposed therebetween.
またケース４には、プロピレンカーボネート（ＰＣ）と
ジメトキシエタン（ＤＭＥ）との混合比が１：１の溶液
に過塩素酸リチウム１モルを溶解させた電解液が注入さ
れている。そしてこのケース４は、正、負極ケース４ａ
、４ｂの間にガスケット５を介在させた状態でかしめる
ことによって、密封されている。Furthermore, an electrolytic solution in which 1 mole of lithium perchlorate is dissolved in a solution of propylene carbonate (PC) and dimethoxyethane (DME) at a mixing ratio of 1:1 is injected into case 4. And this case 4 is positive and negative electrode case 4a
, 4b are crimped with a gasket 5 interposed between them, thereby sealing them.
ところで、下表に示す様に、負極ペレット２を構成して
いるコークスは、従来技術による第１〜第４比較例では
、市販されている各種の塊状コークスをめのう乳鉢で約
１０μｍの大きさに粉砕したものである。By the way, as shown in the table below, the coke constituting the negative electrode pellet 2 was obtained by grinding various types of commercially available lump coke into a size of about 10 μm in an agate mortar in the first to fourth comparative examples based on the conventional technology. It is crushed.
（以下、余白次頁に続く）
また第１〜第３実施例では、これらの粉状コークスを、
数μｍの大きさに再粉砕し、その後、Ａｒの気流中にお
いて、１３００℃または１４００℃の温度で１時間加熱
処理したものである。(The following margin continues on the next page) In addition, in the first to third examples, these powdered cokes were
It was re-pulverized to a size of several μm, and then heat-treated in an Ar gas flow at a temperature of 1300° C. or 1400° C. for 1 hour.
第１図は、これらの実施例及び比較例についての充放電
試験の結果を示している。FIG. 1 shows the results of charge and discharge tests for these Examples and Comparative Examples.
この充放電試験では、充電電流密度１．０６ｍＡ／ｃｎ
”で終止電圧３．６ｖまで充電を行い、次に放電電流密
度１．０６ｍＡ／ａｍ”で終止電圧２．５ｖまで放電を
行って、これを１サイクルとし、サイクル数と電池容量
（及び粉状コークスである負極活物質１ｇ当りの容量）
との関係を求めた。In this charge/discharge test, the charging current density was 1.06 mA/cn.
Charge to a final voltage of 3.6 V at a discharge current density of 1.06 mA/am, and then discharge to a final voltage of 2.5 V at a discharge current density of 1.06 mA/am. Capacity per gram of negative electrode active material which is coke)
I sought a relationship with.
第１図によれば、何れの実施例においても５００サイク
ル以上でも容量が殆ど低下せず、また実施例間で差が殆
どなかった。According to FIG. 1, in any of the examples, the capacity hardly decreased even after 500 cycles, and there was almost no difference between the examples.
これに対して、何れの比較例においても何れの実施例よ
りもサイクル特性が良くなく、しかも比較例間でサイク
ル特性に差があった。On the other hand, all of the comparative examples had poorer cycle characteristics than any of the examples, and there were differences in cycle characteristics between the comparative examples.
そこで、寿命が尽きた比較例の電池を解体したところ、
電解液が着色していた。これは、負極活物質であるコー
クス中に不純物が不均一に含まれており、この不純物が
溶出したためと考えられる。So, when we dismantled the comparative example battery that had reached the end of its lifespan, we found that
The electrolyte was colored. This is thought to be because impurities were unevenly contained in the coke, which is the negative electrode active material, and these impurities were eluted.
またこの不純物は、複素環式化合物がある程度高分子化
したものであると考えられる。Moreover, this impurity is considered to be a heterocyclic compound that has been polymerized to some extent.
この様にコークスが不純物を不均一に含んでいるのは、
その製造工程に起因する。この製造工程では、原料であ
るピッチを焼成して生コークスとし、この生コークスを
粗砕器で粗砕してからか焼することによって、１＋ｕ＋
〜５ｃｍ程度の大きさの塊状コークスを製造する。The reason why coke contains impurities unevenly is because
This is due to its manufacturing process. In this manufacturing process, raw material pitch is fired to produce raw coke, and this raw coke is crushed in a crusher and then calcined to produce 1+u+
Produce lump coke with a size of ~5 cm.
ところが、か焼は半密閉状態で行われるので、生コーク
スに含まれていた不純物の雰囲気中で行われることにな
る。このため、製造されたコークスもこれらの不純物を
含んでいる。However, since calcination is carried out in a semi-closed state, it is carried out in an atmosphere containing impurities contained in the raw coke. Therefore, the produced coke also contains these impurities.
シカモ、コークスの製造工程はコークスの種類や生産ロ
フトによって相違しているので、コークス中の不純物の
含有量も均一ではない。Shikamo and coke manufacturing processes differ depending on the type of coke and production loft, so the content of impurities in coke is not uniform.
一方、実施例の電池の負極活物質として用いたコークス
では、加熱処理によって重量が５％程度減少した。従っ
て、この加熱処理によって、コークス中に含まれていた
不純物が飛散したと考えられる。On the other hand, the weight of the coke used as the negative electrode active material of the battery of the example decreased by about 5% due to the heat treatment. Therefore, it is considered that impurities contained in the coke were scattered by this heat treatment.
加熱温度は、コークスが黒鉛化する１ ８００ ”Ｃを
超えなければ、実施例の１３ＱＯ’Ｃや１４００℃には
限定されない。つまり、３００〜１８００℃が好ましく
、９００〜１６００℃が更に好ましい。そして、加熱温
度が高ければ加熱時間は相対的に短（てよく、逆に加熱
温度が低ければ加熱時間を長（すればよい。The heating temperature is not limited to 13QO'C or 1400°C in the example as long as it does not exceed 1800"C at which the coke graphitizes. In other words, 300 to 1800°C is preferable, and 900 to 1600°C is more preferable. If the heating temperature is high, the heating time may be relatively short; conversely, if the heating temperature is low, the heating time may be long.
但し、第３及び第４比較例で用いたコークスの様にか焼
温度自体が加熱温度と同等程度のコークスを用いた場合
は、実施例の様な処理を施しても効果がなかった。これ
は、結晶厚みＬｃ等の構造が加熱処理に１つても均一に
ならないためと考えられる。However, when a coke whose calcination temperature itself is comparable to the heating temperature, such as the coke used in the third and fourth comparative examples, was used, the treatment as in the example had no effect. This is considered to be because the structure, such as the crystal thickness Lc, does not become uniform even after the heat treatment.
また、粉砕されてい゛ない状態のコークスに対して実施
例の様な処理を施しても、やはり効果がなかった。これ
□は、加熱処理を施してもコークスから不純物が飛散し
にくいためと考えられる。Further, even when the unpulverized coke was treated as in the example, there was still no effect. This □ is thought to be because impurities are difficult to scatter from the coke even after heat treatment.
なお、Ｘ線回折を行い、ＦｅＫα３２″付近の００２面
ピークから、上掲の表中の結晶厚みＬｃを得たが、この
結晶厚みＬＣ自体とサイクル特性との間には明確な関係
を見出せなかった。Although X-ray diffraction was performed and the crystal thickness Lc in the table above was obtained from the 002 plane peak near FeKα32'', no clear relationship could be found between the crystal thickness LC itself and the cycle characteristics. Ta.
以上、本発明の詳細な説明したが、本発明はこれらの実
施例に限定されるものではなく、種々の変形例が考えら
れ得る。Although the present invention has been described in detail above, the present invention is not limited to these embodiments, and various modifications can be made.
例えば、粉状コークスの加熱処理を本実施例ではＡｒの
気流中で行ったが、他の不活性ガスや更に水蒸気や二酸
化炭素の気流中で行ってもよく、真空中で行うこともで
きる。For example, although the heat treatment of powdered coke was performed in an Ar gas flow in this example, it may be performed in an air flow of other inert gases, water vapor, or carbon dioxide, or in a vacuum.
また、本実施例ではＬｉＣｏ０ｔを用いて正極ペレット
１を構成したので、二次電池の使用は充電から始めるが
、コークスを用いて構成されている負極ペレット２にＬ
ｉを予め含有させておけば、二次電池の使用を放電から
始めることができる。In addition, in this example, since the positive electrode pellet 1 was constructed using LiCo0t, the use of the secondary battery starts with charging, but the negative electrode pellet 2 constructed using coke is
If i is included in advance, the use of the secondary battery can be started from discharging.
負極ペレット２にＬｉを予め含有させるには、例えば、
負極ペレット２とＬｉ金属板とを電解液中に潰し、負極
ペレット２の電位をＬｉ金属板の電位より高くして充電
を行えばよい。To make the negative electrode pellet 2 contain Li in advance, for example,
The negative electrode pellet 2 and the Li metal plate may be crushed in an electrolytic solution, and charging may be performed by making the potential of the negative electrode pellet 2 higher than the potential of the Li metal plate.
従ってこの場合は、Ｍｎ０１、Ｔｉｈ、ＦｅＳ、、Ｍｏ
Ｓ ｓ、ｖ２０３、Ｖ１１０１３ ％ ＣｒｚＱ５ 、
ＣｒｚＯｓ等の様にＬｉを含有していなしくが充放電の
可能な活物質を用いて正極を構成することができる。こ
の場合でも、放電を行えば、例えばＬｉＭｎ０ｚが形成
され、実施例と同様な状態になる。Therefore, in this case, Mn01, Tih, FeS, ,Mo
S s, v203, V11013% CrzQ5,
The positive electrode can be constructed using an active material that does not contain Li, such as CrzOs, but can be charged and discharged. Even in this case, if discharge is performed, for example, LiMn0z will be formed, resulting in the same state as in the example.
本発明による二次電池では、低コストのコークスを負極
活物質としているにも拘らずこのコークスは不純物を殆
ど含んでおらず且つ大きな活性を有しているので、サイ
クル特性が良好且つ均一である。In the secondary battery according to the present invention, although low-cost coke is used as the negative electrode active material, this coke contains almost no impurities and has high activity, so the cycle characteristics are good and uniform. .
第１図は本発明の実施例及び比較例のサイクル特性を示
すグラフ、第２図は本発明を適用し得る電池の側断面図
である。
なお図面に用いた符号において、
２−・−・・−・−・・−−−−−・−・・負極ペレッ
トである。FIG. 1 is a graph showing cycle characteristics of examples and comparative examples of the present invention, and FIG. 2 is a side sectional view of a battery to which the present invention can be applied. In addition, in the reference numerals used in the drawings, 2-.--.--.-.---.
Claims (1)
空中で且つ黒鉛化しない温度で加熱処理されたコークス
を負極活物質としている二次電池。A secondary battery whose negative electrode active material is coke that is pulverized and heat-treated in an inert gas stream or vacuum at a temperature that does not cause graphitization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63046168A JPH01221859A (en) | 1988-02-29 | 1988-02-29 | Secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63046168A JPH01221859A (en) | 1988-02-29 | 1988-02-29 | Secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01221859A true JPH01221859A (en) | 1989-09-05 |
Family
ID=12739489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63046168A Pending JPH01221859A (en) | 1988-02-29 | 1988-02-29 | Secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01221859A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08287911A (en) * | 1995-04-18 | 1996-11-01 | Mitsubishi Chem Corp | Nonaqueous secondary battery |
| US5622793A (en) * | 1992-05-25 | 1997-04-22 | Nippon Steel Corporation | Method for preparing negative electrode material for a lithium secondary cell |
| US5958622A (en) * | 1996-03-28 | 1999-09-28 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Negative electrode material for lithium secondary batteries |
| WO2010131476A1 (en) | 2009-05-15 | 2010-11-18 | 新日鐵化学株式会社 | Anode active material for lithium secondary batteries, anode electrode for lithium secondary batteries, in-vehicle lithium secondary battery using said anode active material and anode electrode, and method for manufacturing an anode active material for lithium secondary batteries |
| WO2010131473A1 (en) | 2009-05-15 | 2010-11-18 | 新日鐵化学株式会社 | Anode active material for lithium secondary batteries, anode electrode for lithium secondary batteries, in-vehicle lithium secondary battery using said anode active material and anode electrode, and method for manufacturing an anode active material for lithium secondary batteries |
| EP2453505A1 (en) | 2010-11-12 | 2012-05-16 | Nippon Steel Chemical Co., Ltd. | Negative electrode active material of lithium secondary battery, secondary battery using the same, method for manufacturing the same |
-
1988
- 1988-02-29 JP JP63046168A patent/JPH01221859A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5622793A (en) * | 1992-05-25 | 1997-04-22 | Nippon Steel Corporation | Method for preparing negative electrode material for a lithium secondary cell |
| JPH08287911A (en) * | 1995-04-18 | 1996-11-01 | Mitsubishi Chem Corp | Nonaqueous secondary battery |
| US5958622A (en) * | 1996-03-28 | 1999-09-28 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Negative electrode material for lithium secondary batteries |
| WO2010131476A1 (en) | 2009-05-15 | 2010-11-18 | 新日鐵化学株式会社 | Anode active material for lithium secondary batteries, anode electrode for lithium secondary batteries, in-vehicle lithium secondary battery using said anode active material and anode electrode, and method for manufacturing an anode active material for lithium secondary batteries |
| WO2010131473A1 (en) | 2009-05-15 | 2010-11-18 | 新日鐵化学株式会社 | Anode active material for lithium secondary batteries, anode electrode for lithium secondary batteries, in-vehicle lithium secondary battery using said anode active material and anode electrode, and method for manufacturing an anode active material for lithium secondary batteries |
| US8877384B2 (en) | 2009-05-15 | 2014-11-04 | Nippon Steel Chemical Co., Ltd. | Negative electrode active material of lithium secondary battery, negative electrode of lithium secondary battery, lithium secondary battery for vehicle installation using the negative electrode active material and negative electrode, and method for manufacturing the negative electrode active material |
| US9806342B2 (en) | 2009-05-15 | 2017-10-31 | Nippon Steel & Sumikin Chemical Co., Ltd. | Negative electrode active material of lithium secondary battery, negative electrode of lithium secondary battery, lithium secondary battery for vehicle installation using the negative electrode active material and negative electrode, and method for manufacturing the negative electrode active material |
| EP2453505A1 (en) | 2010-11-12 | 2012-05-16 | Nippon Steel Chemical Co., Ltd. | Negative electrode active material of lithium secondary battery, secondary battery using the same, method for manufacturing the same |
| US9070933B2 (en) | 2010-11-12 | 2015-06-30 | Nippon Steel Chemical Co., Ltd. | Negative electrode active material of lithium secondary battery, secondary battery using the same, method for manufacturing the same |
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