JP3126007B2 - Non-aqueous electrolyte battery - Google Patents
Non-aqueous electrolyte batteryInfo
- Publication number
- JP3126007B2 JP3126007B2 JP05090432A JP9043293A JP3126007B2 JP 3126007 B2 JP3126007 B2 JP 3126007B2 JP 05090432 A JP05090432 A JP 05090432A JP 9043293 A JP9043293 A JP 9043293A JP 3126007 B2 JP3126007 B2 JP 3126007B2
- Authority
- JP
- Japan
- Prior art keywords
- active material
- electrode active
- positive electrode
- fepo
- negative electrode
- 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.)
- Expired - Lifetime
Links
Classifications
-
- 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
Description
【０００１】[0001]
【産業上の利用分野】本発明は、非水電解質電池、さら
に詳細には充放電可能な非水電解質二次電池に関し、特
に正極活物質の改良に関わり、電池の充放電容量の増加
を目的とするものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-aqueous electrolyte battery, and more particularly to a chargeable / dischargeable non-aqueous electrolyte secondary battery. It is assumed that.
【０００２】[0002]
【従来の技術】リチウム等のアルカリ金属およびその合
金や化合物を負極活物質とする非水電解質電池は、負極
金属イオンの正極活物質へのインサーションもしくはイ
ンターカレーション反応によって、その大放電容量と可
充電性を両立させている。従来から、リチウムを負極活
物質として用いる二次電池としては、リチウムに対しイ
ンターカレーションホストとなりうるＶ2 Ｏ5 やＬｉＣ
ｏＯ2 やＬｉＮｉＯ2 などの層状もしくはトンネル状酸
化物を正極に用いた電池が提案されているが、これらの
金属酸化物は、コストの点で実用上難点がある。2. Description of the Related Art A non-aqueous electrolyte battery using an alkali metal such as lithium or an alloy or compound thereof as a negative electrode active material has a large discharge capacity by an insertion or intercalation reaction of a negative electrode metal ion into a positive electrode active material. It balances chargeability. Conventionally, as a secondary battery using lithium as a negative electrode active material, V 2 O 5 or LiC which can serve as an intercalation host for lithium has been used.
Batteries using a layered or tunnel-shaped oxide such as oO 2 or LiNiO 2 as a positive electrode have been proposed, but these metal oxides have practical difficulties in terms of cost.
【０００３】[0003]
【発明が解決しようとする課題】本発明は上記現状の問
題点を改善するために提案されたもので、その目的は、
小型で充放電特性に優れた電池特性を持つ非水電解質電
池を低コストで提供することにある。SUMMARY OF THE INVENTION The present invention has been proposed in order to improve the above-mentioned problems, and its object is to
An object of the present invention is to provide a nonaqueous electrolyte battery having a small size and excellent battery characteristics with excellent charge / discharge characteristics at low cost.
【０００４】[0004]
【課題を解決するための手段】上記の目的を達成するた
め、本発明は組成式ＦｅＰＯ4 で与えられる化合物を正
極活物質とし、リチウムその他のアルカリ金属またはそ
の化合物を負極活物質とし、前記正極活物質及び、前記
負極活物質に対して化学的に安定であり、且つアルカリ
金属イオンが前記正極活物質あるいは前記負極活物質と
電気化学反応をするための移動を行い得る物質を電解質
物質としたことを特徴とする非水電解質電池を発明の要
旨とするものである。In order to achieve the above-mentioned object, the present invention provides a compound having the composition formula FePO 4 as a positive electrode active material, lithium or another alkali metal or a compound thereof as a negative electrode active material, An active material and a material which is chemically stable with respect to the negative electrode active material, and which is capable of performing an alkali metal ion transfer for performing an electrochemical reaction with the positive electrode active material or the negative electrode active material is defined as an electrolyte material. A non-aqueous electrolyte battery characterized by the above is the gist of the invention.
【０００５】[0005]
【作用】本発明の鉄化合物である正極活物質は、既知４
Ｖ級高電圧正極の中でも最も安価なＭｎ酸化物であるＬ
ｉＭｎ2 Ｏ4 に比べてもさらに半分以下の低コストを可
能とするものである。The positive electrode active material, which is the iron compound of the present invention, is a known positive electrode.
L, the cheapest Mn oxide among V-class high voltage positive electrodes
Compared with iMn 2 O 4 , the cost can be reduced by half or less.
【０００６】[0006]
【実施例】次に本発明の実施例について説明する。本発
明ではＦｅＰＯ4 は、ＦｅＰＯ4 ・ｎＨ2 Ｏを熱処理し
て得た。熱分析の結果を図１に示す。図１の熱重量分析
の結果から、市販ＦｅＰＯ4 ・ｎＨ2 Ｏ試薬より結晶水
を完全に除去するためには少なくとも２５０℃以上の熱
処理が必要であることがわかる。曲線Ａは重量の減少、
曲線Ｂは発熱又は吸熱を示す。また、室温および２５０
℃，５５０℃，６００℃，７５０℃各温度での２４時間
熱処理品のＸ線回折結果を図２に示す。２５０℃で熱処
理した試料は非晶質であり、５５０℃〜７５０℃で熱処
理した試料は六方晶である。この正極活物質を用いて正
極を形成するには、ＦｅＰＯ4 化合物粉末とポリテトラ
フルオロエチレンのような結着剤粉末との混合物をニッ
ケル，ステンレス等の支持体上に圧着成形する。あるい
は、かかる混合物質粉末に導電性を付与するため熱分解
黒鉛やアセチレンブラックのような導電性粉末を混合
し、これに更にポリテトラフルオロエチレンのような結
着剤粉末を所要に応じて加え、この混合物を金属容器に
入れ、あるいは前述の混合物をニッケル，ステンレス等
の支持体に圧着成形する等の手段によって形成される。
負極活物質であるリチウムは一般のリチウム電池のそれ
と同様にシート状として、またはそのシートをニッケ
ル，ステンレス等の導電体網に圧着して負極として形成
される。また負極活物質としては、リチウム以外にリチ
ウム合金やリチウム化合物、その他ナトリウム，カリウ
ム等、従来公知のものが使用できる。電解質としては、
例えばジメトキシエタン，２−メチルテトラヒドロフラ
ン，エチレンカーボネート，メチルホルメート，ジメチ
ルスルホキシド，プロピレンカーボネート，アセトニト
リル，ブチロラクトン，ジメチルフォルムアミドなどの
有機溶媒に、ＬｉＡｓＦ6 ，ＬｉＢＦ4 ，ＬｉＰＦ6 ，
ＬｉＡｌＣｌ4 ，ＬｉＣｌＯ4 などのルイス酸を溶解し
た非水電解質溶液が使用できる。更に、セパレータ，構
造材料（電池ケース等）などの他の要素についても従来
公知の各種材料が使用でき、特に制限はない。以下実施
例によって本発明の方法を更に具体的に説明するが、本
発明はこれらによりなんら制限されるものではない。な
お、実施例において電池の作製及び測定はアルゴン雰囲
気下のドライボックス中で行った。Next, an embodiment of the present invention will be described. In the present invention, FePO 4 was obtained by heat-treating FePO 4 .nH 2 O. FIG. 1 shows the results of the thermal analysis. From the results of the thermogravimetric analysis in FIG. 1, it can be seen that a heat treatment of at least 250 ° C. or more is necessary to completely remove water of crystallization from the commercially available FePO 4 .nH 2 O reagent. Curve A is weight loss,
Curve B shows heat generation or heat absorption. Room temperature and 250
FIG. 2 shows the results of X-ray diffraction of the heat-treated product at 24 ° C., 550 ° C., 600 ° C. and 750 ° C. for 24 hours. The sample heat treated at 250 ° C. is amorphous, and the sample heat treated at 550 ° C. to 750 ° C. is hexagonal. To form a positive electrode using this positive electrode active material, a mixture of an FePO 4 compound powder and a binder powder such as polytetrafluoroethylene is compression-molded on a support such as nickel or stainless steel. Alternatively, a conductive powder such as pyrolytic graphite or acetylene black is mixed to impart conductivity to such a mixed substance powder, and a binder powder such as polytetrafluoroethylene is further added thereto as needed, The mixture is placed in a metal container, or the mixture is press-formed on a support such as nickel or stainless steel.
Lithium as the negative electrode active material is formed as a negative electrode by forming a sheet in the same manner as that of a general lithium battery, or by pressing the sheet against a conductive net such as nickel or stainless steel. As the negative electrode active material, other than lithium, a conventionally known material such as a lithium alloy, a lithium compound, and sodium and potassium can be used. As the electrolyte,
For example, LiAsF 6 , LiBF 4 , LiPF 6 , LiPF 6 ,
A non-aqueous electrolyte solution in which a Lewis acid such as LiAlCl 4 or LiClO 4 is dissolved can be used. Further, as for other elements such as a separator and a structural material (such as a battery case), conventionally known various materials can be used, and there is no particular limitation. Hereinafter, the method of the present invention will be described more specifically by way of examples, but the present invention is not limited thereto. In the examples, the production and measurement of the battery were performed in a dry box under an argon atmosphere.
【０００７】〔実施例１〕図３は本発明による電池の一
具体例であるコイン型電池の断面図であり、図中１はス
テンレス製封口板、２はポリプロピレン製ガスケット、
３はステンレス製正極ケース、４はリチウム負極、５は
ポリプロピレン製微孔性セパレータ、６は正極合剤ペレ
ットを示す。正極活物質は、ＦｅＰＯ4 ・ｎＨ2 Ｏを２
５０℃で３６時間熱処理してＦｅＰＯ4 を無水化したも
のを用いた。得られた無水ＦｅＰＯ4 を導電剤（アセチ
レンブラック粉末），結着剤（ポリテトラフルオロエチ
レン）と共に、７０：２５：５の重量比で混合の上、ロ
ール成形し、正極合剤ペレット６（厚さ０．５ｍｍ，直
径１７ｍｍ，２００ｍｇ／ｃｅｌｌ）とした。まず、封
口板１上に金属リチウム負極４を加圧配置したものを、
ガスケット２の凹部に挿入し、金属リチウム負極４の上
にセパレータ５，正極合剤ペレット６の順序に配置し、
電解液としてプロピレンカーボネート（ＰＣ）と２−ジ
メトキシエタン（ＤＭＥ）の等容積混合溶媒にＬｉＣｌ
Ｏ4 を溶解させた１規定溶液をそれぞれ適量注入して含
浸させた後に、正極ケース３をかぶせてかしめることに
より、厚さ２ｍｍ，直径２３ｍｍのコイン型電池を作製
した。実施例１のリチウム２次電池について、０．５ｍ
Ａ／ｃｍ2 の放電電流密度で４．５Ｖ＞１Ｖの電圧規制
下の充放電試験を行ったところ、図４に示す良好な特性
図を得、可逆的に充放電できることがわかった。図４に
おいて、縦軸にセル電圧、横軸に充放電時間をとり、右
下りの曲線は放電、右上りの曲線は充電状態を示す。FIG. 3 is a cross-sectional view of a coin-type battery as a specific example of the battery according to the present invention. In FIG. 3, 1 is a stainless steel sealing plate, 2 is a polypropylene gasket,
Reference numeral 3 denotes a stainless steel positive electrode case, 4 denotes a lithium negative electrode, 5 denotes a polypropylene microporous separator, and 6 denotes a positive electrode mixture pellet. The positive electrode active material is FePO 4 .nH 2 O 2
Heat-treated at 50 ° C. for 36 hours to dehydrate FePO 4 was used. The obtained anhydrous FePO 4 was mixed with a conductive agent (acetylene black powder) and a binder (polytetrafluoroethylene) in a weight ratio of 70: 25: 5, and then roll-molded to form a positive electrode mixture pellet 6 (thickness). 0.5 mm, diameter 17 mm, 200 mg / cell). First, a metal lithium negative electrode 4 placed under pressure on a sealing plate 1 is
Inserted into the recess of the gasket 2, placed on the lithium metal anode 4 in the order of the separator 5 and the cathode mixture pellet 6,
LiCl in an equal volume mixed solvent of propylene carbonate (PC) and 2-dimethoxyethane (DME) as electrolyte
After injecting and impregnating an appropriate amount of a 1 N solution in which O 4 was dissolved, the positive electrode case 3 was covered and swaged to produce a coin-type battery having a thickness of 2 mm and a diameter of 23 mm. 0.5 m for the lithium secondary battery of Example 1
When a charge / discharge test was performed under a voltage regulation of 4.5 V> 1 V at a discharge current density of A / cm 2 , a favorable characteristic diagram shown in FIG. 4 was obtained, and it was found that reversible charge / discharge was possible. In FIG. 4, the vertical axis represents the cell voltage, the horizontal axis represents the charging / discharging time, and the downward-sloping curve shows the discharging and the upper-right curve shows the charging state.
【０００８】〔比較例１〕市販のＦｅＰＯ4 ・ｎＨ2 Ｏ
試薬を９０℃の真空乾燥処理後、正極として用いた以
外、実施例１と同様な構造のコイン型電池を組み立て
た。しかして、実施例１及び比較例１のリチウム２次電
池について、０．５ｍＡ／ｃｍ2 の放電電流密度で４．
５Ｖ＞１Ｖの電圧規制下の充放電試験を行ったところ、
その放電容量の充放電サイクル回数に伴う劣化挙動を図
５に示す。両者の比較から単に市販試薬のＦｅＰＯ4 ・
ｎＨ2 Ｏを９０℃で真空乾燥しただけでは結晶に含まれ
る水分が除去しきれず、良好なサイクル特性が得られな
い。ＦｅＰＯ4 ・ｎＨ2 Ｏの熱処理による無水化処理品
がＦｅＰＯ4 の高電圧容量向上に効果的であることがわ
かる。Comparative Example 1 Commercially available FePO 4 .nH 2 O
A coin-type battery having the same structure as in Example 1 was assembled except that the reagent was subjected to a vacuum drying treatment at 90 ° C. and used as a positive electrode. Thus, for the lithium secondary batteries of Example 1 and Comparative Example 1, at a discharge current density of 0.5 mA / cm 2 , 4.
When a charge / discharge test under voltage regulation of 5V> 1V was performed,
FIG. 5 shows the deterioration behavior of the discharge capacity with the number of charge / discharge cycles. From the comparison between the two, the commercial reagent FePO 4.
If nH 2 O is simply vacuum dried at 90 ° C., water contained in the crystals cannot be completely removed, and good cycle characteristics cannot be obtained. It can be seen that the product dehydrated by heat treatment of FePO 4 .nH 2 O is effective for improving the high voltage capacity of FePO 4 .
【０００９】〔実施例２〕熱処理温度による結晶系の影
響を調べるため、実施例１と同じコイン型電池を用い
て、ＦｅＰＯ4 ・ｎＨ2 Ｏ熱処理条件を６００℃，２４
時間に変えた以外は実施例１と同条件でその充放電特性
を測定した。この熱処理条件で得られる六方晶ＦｅＰＯ
4 の充放電曲線を図６に示す。高温熱処理により結晶化
しても、２サイクル目以降の充放電曲線は実施例１の非
晶質熱処理品と類似しており、電池特性上の優劣はほと
んど見られない。Example 2 In order to examine the influence of the crystal system on the heat treatment temperature, the same coin-type battery as in Example 1 was used, and the heat treatment conditions of FePO 4 .nH 2 O were set at 600 ° C. and 24 ° C.
The charge and discharge characteristics were measured under the same conditions as in Example 1 except that the time was changed. Hexagonal FePO obtained under these heat treatment conditions
The charge / discharge curve of No. 4 is shown in FIG. Even when crystallized by the high-temperature heat treatment, the charge / discharge curves after the second cycle are similar to those of the amorphous heat-treated product of Example 1, and there is almost no difference in battery characteristics.
【００１０】[0010]
【発明の効果】以上説明したように、本発明によれば、
可逆容量の大きな小型高エネルギー密度のリチウム電池
を極めて低コストで構成することができ、本発明電池は
コイン型電池など種々の分野に利用できるという利点を
有する。As described above, according to the present invention,
A small high-density lithium battery having a large reversible capacity can be formed at extremely low cost, and the battery of the present invention has an advantage that it can be used in various fields such as a coin-type battery.
【図１】本発明の一実施例であるＦｅＰＯ4 ・ｎＨ2 Ｏ
の熱重量分析及び示差熱分析特性図を示す。FIG. 1 is an embodiment of the present invention, FePO 4 .nH 2 O
1 shows a thermogravimetric analysis and differential thermal analysis characteristic diagram of the sample.
【図２】本発明の一実施例であるＦｅＰＯ4 ・ｎＨ2 Ｏ
の各熱処理温度でのＸ線回折特性図を示す。FIG. 2 shows an embodiment of the present invention, FePO 4 .nH 2 O;
3 shows X-ray diffraction characteristics at each heat treatment temperature.
【図３】本発明の一実施例におけるコイン電池の構成例
を示す断面図である。FIG. 3 is a cross-sectional view illustrating a configuration example of a coin battery according to an embodiment of the present invention.
【図４】本発明の一実施例であるＦｅＰＯ4 熱処理品の
０．５ｍＡ／ｃｍ2 充放電電流時の４．５Ｖ＞１Ｖ電圧
規制充放電曲線を示す特性図である。FIG. 4 is a characteristic diagram showing a 4.5V> 1V voltage regulation charge / discharge curve at a charge / discharge current of 0.5 mA / cm 2 of the heat-treated FePO 4 product according to one embodiment of the present invention.
【図５】本発明の一実施例であるＦｅＰＯ4 熱処理品
（本発明）及び未処理品（従来品）の０．５ｍＡ／ｃｍ
2 充放電電流時の放電容量の充放電サイクル回数に伴う
劣化挙動を示す特性図である。FIG. 5 shows 0.5 mA / cm of an FePO 4 heat-treated product (invention) and an untreated product (conventional product) according to one embodiment of the present invention.
FIG. 2 is a characteristic diagram showing a deterioration behavior of a discharge capacity at the time of two charge / discharge currents with the number of charge / discharge cycles.
【図６】本発明の一実施例である無水ＦｅＰＯ4 結晶の
０．５ｍＡ／ｃｍ2 放電電流時の４．５Ｖ＞１Ｖ規制充
放電曲線を示す特性図である。FIG. 6 is a characteristic diagram showing a 4.5V> 1V regulated charge / discharge curve at the time of a discharge current of 0.5 mA / cm 2 of the anhydrous FePO 4 crystal which is an example of the present invention.
１ ステンレス製封口板 ２ ポリプロピレン製ガスケット ３ ステンレス製正極ケース ４ リチウム負極 ５ ポリプロピレン製セパレータ ６ 正極合剤ペレット 1 stainless steel sealing plate 2 polypropylene gasket 3 stainless steel positive electrode case 4 lithium negative electrode 5 polypropylene separator 6 positive electrode mixture pellet
───────────────────────────────────────────────────── フロントページの続き (72)発明者 柴田 昌司 東京都千代田区内幸町１丁目１番６号 日本電信電話株式会社内 (72)発明者 市村 雅弘 東京都千代田区内幸町１丁目１番６号 日本電信電話株式会社内 (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 4/36 - 4/62 H01M 4/02 - 4/04 H01M 10/36 - 10/40 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shoji Shibata 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Masahiro Ichimura 1-16-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (58) Fields surveyed (Int.Cl. 7 , DB name) H01M 4/36-4/62 H01M 4/02-4/04 H01M 10/36-10/40
Claims (2)
正極活物質とし、リチウムその他のアルカリ金属または
その化合物を負極活物質とし、前記正極活物質及び、前
記負極活物質に対して化学的に安定であり、且つアルカ
リ金属イオンが前記正極活物質あるいは前記負極活物質
と電気化学反応をするための移動を行い得る物質を電解
質物質としたことを特徴とする非水電解質電池。1. A compound represented by the composition formula FePO 4 is used as a positive electrode active material, and lithium or another alkali metal or a compound thereof is used as a negative electrode active material, and is chemically stable to the positive electrode active material and the negative electrode active material. A non-aqueous electrolyte battery, characterized in that a substance capable of transferring an alkali metal ion to cause an electrochemical reaction with the positive electrode active material or the negative electrode active material is used as an electrolyte material.
ＰＯ4 は、ＦｅＰＯ4 ・ｎＨ2 Ｏを熱分解することによ
り得られた無水晶であることを特徴とする非水電解質電
池。2. The method according to claim 1, wherein the positive electrode active material is Fe.
PO 4 is a non-aqueous electrolyte battery obtained by pyrolyzing FePO 4 .nH 2 O.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05090432A JP3126007B2 (en) | 1993-03-26 | 1993-03-26 | Non-aqueous electrolyte battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05090432A JP3126007B2 (en) | 1993-03-26 | 1993-03-26 | Non-aqueous electrolyte battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06283207A JPH06283207A (en) | 1994-10-07 |
| JP3126007B2 true JP3126007B2 (en) | 2001-01-22 |
Family
ID=13998454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05090432A Expired - Lifetime JP3126007B2 (en) | 1993-03-26 | 1993-03-26 | Non-aqueous electrolyte battery |
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| Country | Link |
|---|---|
| JP (1) | JP3126007B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004036672A1 (en) * | 2002-10-18 | 2004-04-29 | Japan As Represented By President Of The University Of Kyusyu | Method for preparing positive electrode material for lithium cell, and lithium cell |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5910382A (en) * | 1996-04-23 | 1999-06-08 | Board Of Regents, University Of Texas Systems | Cathode materials for secondary (rechargeable) lithium batteries |
| US6514640B1 (en) | 1996-04-23 | 2003-02-04 | Board Of Regents, The University Of Texas System | Cathode materials for secondary (rechargeable) lithium batteries |
| CN1323447C (en) * | 1999-04-06 | 2007-06-27 | 索尼株式会社 | Positive electrode active material, non-aqueous electrolyte secondary battery |
| KR20010025116A (en) * | 1999-04-06 | 2001-03-26 | 이데이 노부유끼 | Method for manufacturing active material of positive plate and method for manufacturing nonaqueous electrolyte secondary cell |
| CA2270771A1 (en) | 1999-04-30 | 2000-10-30 | Hydro-Quebec | New electrode materials with high surface conductivity |
| JP4848582B2 (en) * | 2000-10-06 | 2011-12-28 | ソニー株式会社 | Method for producing positive electrode active material |
| JP3997702B2 (en) * | 2000-10-06 | 2007-10-24 | ソニー株式会社 | Nonaqueous electrolyte secondary battery |
| JP5011518B2 (en) * | 2005-07-01 | 2012-08-29 | 国立大学法人九州大学 | Method for producing positive electrode material for secondary battery, and secondary battery |
| US8158090B2 (en) | 2005-08-08 | 2012-04-17 | A123 Systems, Inc. | Amorphous and partially amorphous nanoscale ion storage materials |
| US7939201B2 (en) | 2005-08-08 | 2011-05-10 | A123 Systems, Inc. | Nanoscale ion storage materials including co-existing phases or solid solutions |
| US8323832B2 (en) | 2005-08-08 | 2012-12-04 | A123 Systems, Inc. | Nanoscale ion storage materials |
| JP2007080839A (en) * | 2006-11-22 | 2007-03-29 | Gs Yuasa Corporation:Kk | Nonaqueous solid electrolyte cell |
| JP4984945B2 (en) * | 2007-02-14 | 2012-07-25 | 株式会社Ｇｓユアサ | Non-aqueous electrolyte battery |
| JP5159134B2 (en) * | 2007-03-23 | 2013-03-06 | 三洋電機株式会社 | Nonaqueous electrolyte secondary battery |
| JP5159133B2 (en) * | 2007-03-23 | 2013-03-06 | 三洋電機株式会社 | Nonaqueous electrolyte secondary battery |
| JP5423495B2 (en) * | 2010-03-15 | 2014-02-19 | 株式会社Ｇｓユアサ | Nonaqueous electrolyte secondary battery |
| CN103915626A (en) * | 2014-04-21 | 2014-07-09 | 上海电力学院 | Sodium ion battery composite positive material and preparation method thereof |
-
1993
- 1993-03-26 JP JP05090432A patent/JP3126007B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004036672A1 (en) * | 2002-10-18 | 2004-04-29 | Japan As Represented By President Of The University Of Kyusyu | Method for preparing positive electrode material for lithium cell, and lithium cell |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06283207A (en) | 1994-10-07 |
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