JPH04115459A - Preparation of positive electrode material for lithium battery - Google Patents
Preparation of positive electrode material for lithium batteryInfo
- Publication number
- JPH04115459A JPH04115459A JP23870790A JP23870790A JPH04115459A JP H04115459 A JPH04115459 A JP H04115459A JP 23870790 A JP23870790 A JP 23870790A JP 23870790 A JP23870790 A JP 23870790A JP H04115459 A JPH04115459 A JP H04115459A
- Authority
- JP
- Japan
- Prior art keywords
- lioh
- positive electrode
- electrode material
- mixture
- firing
- 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
- 239000007774 positive electrode material Substances 0.000 title claims abstract description 12
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims description 8
- 229910052744 lithium Inorganic materials 0.000 title claims description 8
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 30
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims abstract description 14
- 238000010304 firing Methods 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 abstract description 9
- 238000011109 contamination Methods 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 abstract description 4
- 229910052808 lithium carbonate Inorganic materials 0.000 abstract description 4
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 abstract description 3
- 239000011572 manganese Substances 0.000 abstract description 2
- GLXDVVHUTZTUQK-UHFFFAOYSA-M lithium;hydroxide;hydrate Chemical compound [Li+].O.[OH-] GLXDVVHUTZTUQK-UHFFFAOYSA-M 0.000 abstract 3
- 229910001868 water Inorganic materials 0.000 description 14
- 238000002441 X-ray diffraction Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 229910002102 lithium manganese oxide Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910002983 Li2MnO3 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000010406 cathode material Substances 0.000 description 2
- QEXMICRJPVUPSN-UHFFFAOYSA-N lithium manganese(2+) oxygen(2-) Chemical class [O-2].[Mn+2].[Li+] QEXMICRJPVUPSN-UHFFFAOYSA-N 0.000 description 2
- VLXXBCXTUVRROQ-UHFFFAOYSA-N lithium;oxido-oxo-(oxomanganiooxy)manganese Chemical compound [Li+].[O-][Mn](=O)O[Mn]=O VLXXBCXTUVRROQ-UHFFFAOYSA-N 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910015645 LiMn Inorganic materials 0.000 description 1
- 229910014143 LiMn2 Inorganic materials 0.000 description 1
- 229910014549 LiMn204 Inorganic materials 0.000 description 1
- 229910016978 MnOx Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- Y02E60/12—
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野コ 本発明はリチウム電池用正極材料の製法に関する。[Detailed description of the invention] [Industrial application fields] The present invention relates to a method for producing a positive electrode material for lithium batteries.
［従来の技術］
従来、リチウム電池用正極材料は、二酸化マンガン（Ｍ
ｎＯ２）とＬＩＯＨ−８２０との混合物を適当な温度で
焼成することにより製造されている。たとえば、Ｌｉ２
ＭｎＯｘやスピネル型ＬＩＭｎ２０４の合成がそれであ
り、通常３５０〜４５０”Ｃで２〜４０時間の焼成が行
なわれる。Ｌｉ０Ｈ−８２０のかわりにＬｉ２ＣＯｘを
用いることも行なわれている。（特開昭６３−１１１７
５６９号公報参照）
前記焼成の際の昇温時の加熱にともない、１．Ｉ ＯＩ
ｔ・Ｈ２Ｏからの脱水がまず５０℃前後で開始して１２
０℃附近で終了し、Ｌｉ０Ｉ（含水物が無水Ｌ Ｉ Ｏ
Ｈに変換する。また、その温度域とほぼ重複して、Ｍｎ
Ｏ２中に含まれる蒸発しやすい水分の脱離も開始、終了
し、ＭｎＯ２中の含水量も大巾に低下する。そうした変
化ののち、ＭｎＯ２とＬｉＯＨが式：
％式％
に示されるように反応する。[Prior art] Conventionally, the positive electrode material for lithium batteries is manganese dioxide (M
It is manufactured by firing a mixture of nO2) and LIOH-820 at an appropriate temperature. For example, Li2
This is the synthesis of MnOx and spinel-type LIMn204, which is usually fired at 350-450"C for 2-40 hours. Li2COx has also been used in place of Li0H-820. 1117
(See Publication No. 569) With the heating during the temperature rise during the firing, 1. IOI
Dehydration from tH2O first starts at around 50℃, and then 12
It finishes at around 0℃, and Li0I (water content becomes anhydrous LIO
Convert to H. Also, almost overlapping that temperature range, Mn
Desorption of moisture contained in O2, which is easily evaporated, also begins and ends, and the water content in MnO2 also decreases significantly. After such a change, MnO2 and LiOH react as shown in the formula: %Formula %.
［発明が解決しようとする課題］
しかし、原料として用いるＬ ｉ ＯＨ・Ｈ２Ｏは強ア
ルカリ性水酸化物の常として空気中からＣＯ２を吸収し
やすく、常にコンタミネーション成分としてＬｉ２ＣＯ
３を含有している。該Ｌ１２ＣＯ３はＭｎＯ２と反応し
にくい物質であり、また原料中の含有率はコンタミネー
ションの常として一定しないため、焼成して製造された
正極材料の品質も一定しないという問題かある。[Problem to be solved by the invention] However, LiOH・H2O used as a raw material easily absorbs CO2 from the air as a strong alkaline hydroxide, and Li2CO is always a contaminating component.
Contains 3. L12CO3 is a substance that hardly reacts with MnO2, and its content in raw materials is not constant due to contamination, so there is a problem that the quality of the cathode material produced by firing is not constant.
一方ＬＬ２ＣＯ３ｔｏｏ％の原料を用いると、Ｌｉ２Ｃ
Ｏ３が遅反応性物質であるため、高い温度で長時間の焼
成か必要になる。On the other hand, if LL2CO3too% raw material is used, Li2C
Since O3 is a slow-reacting substance, firing at high temperatures and for long periods of time is required.
本発明は前記のような問題点を解消するためになされた
ものであり、製造される正極材料の品質かＬｉ０）１−
８２０原料中のコンタミネーション成分であるＬ ｉ
２ＣＯｓの含有量に左右されない正極材料の製法をうる
ことを目的とする。The present invention has been made to solve the above-mentioned problems, and the quality of the positive electrode material to be manufactured depends on Li0)1-
Li, a contamination component in the 820 raw material
The purpose of this invention is to provide a method for producing a positive electrode material that is not affected by the content of 2COs.
［課題を解決するための手段］
本発明は、二酸化マンガンとＬｉＯＨ，ＬｉＯＨ・Ｈ２
０および１ｉ２ｃＯｘのうちの１種以上との混合物を焼
成する際に、水蒸気による加湿を行なった雰囲気ガスを
用いることを特徴とするリチウム電池用正極材料の製法
に関する。[Means for Solving the Problems] The present invention provides manganese dioxide, LiOH, LiOH・H2
The present invention relates to a method for producing a positive electrode material for a lithium battery, characterized in that an atmospheric gas humidified with water vapor is used when firing a mixture with one or more of 0 and 1i2cOx.
［作 用］
水蒸気はＬｉ０Ｈ−Ｈ２０原料中に存在するコンタミネ
ーション成分であるＬ１２ＣＯ３に働きかけて、炭酸塩
を水酸化物化する。したがって、加湿焼成中にＬｉ２Ｃ
Ｏ３が水酸化物に変換させられ、キャンセルさレルノで
、焼成前ｔ：Ｄ Ｌｉ０Ｉｌ ・Ｈ２０原料中（’）Ｌ
ｉ２ＣＯ３含有量にかかわらず焼成後の正極材料はほと
んと同一の品質のものか再現性よく安定してえられる。[Function] Water vapor acts on L12CO3, which is a contamination component present in the Li0H-H20 raw material, and converts carbonate into hydroxide. Therefore, Li2C during humidified firing
O3 is converted to hydroxide and canceled in Lerno, before calcination t:D Li0Il ・H20 in the raw material (')L
Regardless of the i2CO3 content, the cathode material after firing is of almost the same quality or can be obtained stably with good reproducibility.
なお、原料としＴ： ＬｊＯＨ−Ｈ２０を用いずＬｉ２
ＣＯ３１００％のものを用いたばおいても、はとんど同
一の品質のものかえられる。In addition, as a raw material T: Li2 without using LjOH-H20
Even if you use 100% CO3, you can always replace it with the same quality.
［実施例コ
本発明て用いられるＭｎＯ２とＬｊＯＨＳＬｉＯＨ・Ｈ
２０およびＬｉ２Ｃ０ｇのうちの１種以上との混合物に
おけるＭｎＯ２の割合はＭｎとＬＬがモル比て８／２〜
５１５となるような割合であるのが好ましい。[Example MnO2 and LjOHSLiOH・H used in the present invention]
The ratio of MnO2 in the mixture with one or more of
Preferably, the ratio is 515.
本発明では、前記混合物の焼成が水蒸気による加湿を行
なった雰囲気ガスを用いて行なわれる。In the present invention, the mixture is fired using an atmospheric gas humidified with water vapor.
前記雰囲気ガスの具体例としては、たとえばチッ素ガス
、空気、脱ＣＯ２化空気などがあげられる。Specific examples of the atmospheric gas include nitrogen gas, air, CO2-free air, and the like.
前記加湿は、加湿器を用い、加湿器中の水温を一定（５
０℃、７５℃、９０℃など）に保ち、その中を通った雰
囲気ガスを焼成炉中に導入することにより行なわれる。The humidification is performed by using a humidifier and keeping the water temperature in the humidifier constant (5
This is carried out by introducing the atmospheric gas that has passed through the temperature into the firing furnace.
前記加湿は、水温を５０−１００”ｃに保持して行なう
のか好ましい。It is preferable that the humidification is performed while maintaining the water temperature at 50-100''c.
焼成温度、時間にはとくに限定はなく、たとえハ３５０
〜４５０℃で２〜４０時間焼成を行なうなど、通常の条
件でよい。There are no particular limitations on the firing temperature and time, even if
Normal conditions may be used, such as baking at ~450°C for 2 to 40 hours.
以上のような本発明の方法により、一定の品質の正極材
料を容易にうることができる。By the method of the present invention as described above, a positive electrode material of constant quality can be easily obtained.
つぎに本発明を実施例に基づいてさらに具体的に説明す
る。Next, the present invention will be explained in more detail based on examples.
実施例ｌ
ＭｎＯ２９，７ｇとＬｉ０Ｈ−８２０２，（ｌ ｇをめ
のう乳鉢で粉砕混合した。ついて、水温を５（１’ｃに
保持した水蒸気による加湿を行なったチッ素雰囲気中で
、この混合物を３７５℃で２０時間焼成した。Example 1 29.7 g of MnO and 1 g of Li0H-8202 were pulverized and mixed in an agate mortar.Then, this mixture was heated to 375 ml in a nitrogen atmosphere humidified with water vapor at a water temperature of 5 (1'C). It was baked at ℃ for 20 hours.
えられた焼成物のＸ線回折パターンを調べた。The X-ray diffraction pattern of the obtained fired product was examined.
結果を第１図のくωに示す。なお、第１図には、Ａ３７
Ｍカードに示されティるＬｉＭｎ２０４ 、Ｌｉ２ Ｍ
ｎＯ３、ＭｎＯ２のパターンも示した。The results are shown in ω in Figure 1. In addition, in Fig. 1, A37
LiMn204, Li2M shown on M card
The patterns of nO3 and MnO2 are also shown.
実施例２
水温を７５℃に保持したほかは実施例１と同様にして焼
成し、焼成物のＸ線回折パターンを調べた。Example 2 Baking was carried out in the same manner as in Example 1 except that the water temperature was maintained at 75°C, and the X-ray diffraction pattern of the fired product was examined.
結果を第１図の＋ｂ＋に示す。The results are shown at +b+ in FIG.
実施例３
水温を９０℃に保持したほかは実施例１と同様にして焼
成し、焼成物のＸ線回折パターンを調べた。Example 3 Baking was carried out in the same manner as in Example 1 except that the water temperature was maintained at 90°C, and the X-ray diffraction pattern of the fired product was examined.
結果を第１図の（Ｃ）に示す。The results are shown in FIG. 1(C).
比較例１
加湿しなかったほかは実施例１と同様にして焼成し、焼
成物のＸ線回折パターンを調べた。結果を第１図の（ｃ
ｂに示す。Comparative Example 1 Baking was performed in the same manner as in Example 1 except that humidification was not performed, and the X-ray diffraction pattern of the fired product was examined. The results are shown in Figure 1 (c
Shown in b.
実施例４
Ｍｎ０２５．５ｇとＬｉ２ＣＯｘ ２．Ｏｇをめのう乳
鉢で粉砕混合した。ついで、水温を９０℃に保持した水
蒸気による加湿を行なったチッ素雰囲気中で、この混合
物を３７５℃で２０時間焼成した。Example 4 Mn025.5g and Li2COx 2. Og was ground and mixed in an agate mortar. Next, this mixture was fired at 375° C. for 20 hours in a nitrogen atmosphere humidified with water vapor while keeping the water temperature at 90° C.
えられた焼成物のＸ線回折パターンを調べた。The X-ray diffraction pattern of the obtained fired product was examined.
結果を第２図の（ａ）に示す。なお、第２図には、Ａ３
７Ｍカードに示されているＬ ｉ Ｍ ｎ ｚ Ｏ４、
Ｌｉ２ＭｎＯｓ、ＭｎＯ２のパターンも示した。The results are shown in FIG. 2(a). In addition, in Fig. 2, A3
L i M n z O4 shown on the 7M card,
Patterns of Li2MnOs and MnO2 are also shown.
実施例５
水温を７５℃に保持したほかは実施例４と同様にして焼
成し、焼成物のＸ線回折パターンを調べた。Example 5 Baking was carried out in the same manner as in Example 4 except that the water temperature was maintained at 75°C, and the X-ray diffraction pattern of the fired product was examined.
結果を第２図の曲に示す。The results are shown in the song in Figure 2.
実施例６
水温を５０℃に保持したほかは実施例４と同様にして焼
成し、焼成物のＸ線回折パターンを調べた。Example 6 Baking was carried out in the same manner as in Example 4 except that the water temperature was maintained at 50°C, and the X-ray diffraction pattern of the fired product was examined.
結果を第２図の（Ｃ）に示す。The results are shown in FIG. 2(C).
比較例２
加湿しなかったほかは実施例４と同様にして焼成し、焼
成物のＸ線回折パターンを調べた。結果を第２図のく小
に示す。Comparative Example 2 Baking was performed in the same manner as in Example 4 except that humidification was not performed, and the X-ray diffraction pattern of the fired product was examined. The results are shown in the small part of Figure 2.
実施例１〜３でえられた焼成物はＬｉ２ＭｎＯｘを主と
し、その他Ｌ４Ｍｎ２０＜などを含むリチウムマンガン
酸化物であり、かつ未反応のＭｎＯ２を含む物質である
。この物質は第１図に示されるように２０が１８″およ
び４５″のピークか加湿なしの比較例１のものと比較し
て高くなっていることから、リチウムマンガン酸化物が
多く生成していることがわかる。また加湿することによ
り２θが４５°のピークが増大することは、焼成物に含
まれるＬｉ２ ＭｎＯ３の量が多くなっていることを示
しており、不純物Ｌ ｉ ２Ｃ０３から生じるＬｉＭｎ
２０ａの量か減少していることを示している。The fired products obtained in Examples 1 to 3 are lithium manganese oxides containing mainly Li2MnOx and other substances such as L4Mn20<, and also contain unreacted MnO2. As shown in Figure 1, this material has higher peaks at 18'' and 45'' than in Comparative Example 1 without humidification, indicating that a large amount of lithium manganese oxide is produced. I understand that. Furthermore, the increase in the peak at 2θ of 45° due to humidification indicates that the amount of Li2MnO3 contained in the fired product is increased, and LiMn generated from impurities Li2C03
This shows that the amount of 20a is decreasing.
また、実施例１〜３てえられた焼成物を正極活物質とし
て用いたリチウム二次電池は、優良な二次電池特性を示
した。In addition, lithium secondary batteries using the fired products obtained in Examples 1 to 3 as positive electrode active materials exhibited excellent secondary battery characteristics.
実施例４〜６てえられた焼成物はＩｊＭｎ２０ｔを生と
し、その他Ｌ Ｉ ２ Ｍ ｎ ０３などを含むリチウ
ムマンガン酸化物であり、かつ未反応のＭｎＯ２を含む
物質である。この物質は第２図に示されるように比較例
２のものと比較してリチウムマンガン酸化物が多く生成
していることがわかる。また、比較例２てはＬｉＭｎ２
０＜特有の２θが３８．５°のピークが１ってているが
、７５℃、９０℃加湿では３６．５’のピークとは別に
３７°のＬｉ２ＭｎＯ３特有のピークがでてきている。The fired products obtained in Examples 4 to 6 are lithium manganese oxides containing IjMn20t, other materials such as L I 2 M n 03, and unreacted MnO2. As shown in FIG. 2, it can be seen that more lithium manganese oxide is produced in this material than in Comparative Example 2. Moreover, in Comparative Example 2, LiMn2
There is one peak at 38.5° with a 2θ characteristic of 0<0, but when humidified at 75°C and 90°C, a peak unique to Li2MnO3 of 37° appears in addition to the peak at 36.5'.
これは、加湿することにより、Ｌ ｉ ２ＣＯｘの一部
がＬｌｏＨに変化するため、ＬＩＯＨとＭｎＯ２が反応
してＬｉｚ ＭｎＯｓがＬ Ｉ Ｍ ｎ ２０４に混し
って生成したことを示している。This indicates that, due to humidification, a part of L i 2COx changes to LloH, so that LIOH and MnO2 react and Liz MnOs is mixed with L I M n 204 and generated.
実施例４〜６でえられた焼成物を正極活物質として用い
たリチウム二次電池は、優良な二次電池特性を示した。Lithium secondary batteries using the fired products obtained in Examples 4 to 6 as positive electrode active materials exhibited excellent secondary battery characteristics.
［発明の効果］
以上のように、本発明では焼成を加湿条件下で行なうよ
うにしたので、
（１）焼結体の品質がＬｉ２ＣＯ３コンタミネーション
成分の影響をうけない、
０安定した品質のリチウム電池用正極材料を容易に製造
することができる、
に）設備が簡便である
という効果を奏する。[Effects of the Invention] As described above, in the present invention, sintering is performed under humidified conditions, so that (1) the quality of the sintered body is not affected by Li2CO3 contamination components, and the quality of lithium is stable. The positive electrode material for batteries can be easily manufactured, and (2) the equipment is simple.
第１図および第２図は、それぞれ焼成物のＸ線回折パタ
ーンとＡＳＴＭカードに示されているＸ線回折結果を示
すグラフである。
オ １ 図
代 理 人 大 岩 増 雄＋０
２０ ３０ ４０ ５０ ６０ ７０２ｅ （Ｃｕｋｇ
）FIGS. 1 and 2 are graphs showing the X-ray diffraction pattern of the fired product and the X-ray diffraction results shown on the ASTM card, respectively. O 1 Masuo Tsuyo Oiwa Masuo +0
20 30 40 50 60 702e (Cukg
)
Claims (1)
およびＬｉ＿２ＣＯ＿３のうちの１種以上との混合物を
焼成する際に、水蒸気による加湿を行なった雰囲気ガス
を用いることを特徴とするリチウム電池用正極材料の製
法。(1) Manganese dioxide and LiOH, LiOH-H_2O
A method for producing a positive electrode material for a lithium battery, characterized in that an atmospheric gas humidified with water vapor is used when firing a mixture with one or more of Li_2CO_3 and Li_2CO_3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23870790A JPH04115459A (en) | 1990-09-05 | 1990-09-05 | Preparation of positive electrode material for lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23870790A JPH04115459A (en) | 1990-09-05 | 1990-09-05 | Preparation of positive electrode material for lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04115459A true JPH04115459A (en) | 1992-04-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23870790A Pending JPH04115459A (en) | 1990-09-05 | 1990-09-05 | Preparation of positive electrode material for lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04115459A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0730314A1 (en) * | 1995-03-03 | 1996-09-04 | Matsushita Electric Industrial Co., Ltd. | Method of producing cathode active material for non-aqueous electrolyte secondary battery |
| WO1997005062A1 (en) * | 1995-08-02 | 1997-02-13 | Union Miniere S.A. | Synthesis of lithiated transition metal oxides |
| WO2023276872A1 (en) * | 2021-06-28 | 2023-01-05 | 住友化学株式会社 | Method for producing lithium metal composite oxide |
-
1990
- 1990-09-05 JP JP23870790A patent/JPH04115459A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0730314A1 (en) * | 1995-03-03 | 1996-09-04 | Matsushita Electric Industrial Co., Ltd. | Method of producing cathode active material for non-aqueous electrolyte secondary battery |
| US5770173A (en) * | 1995-03-03 | 1998-06-23 | Matsushita Electric Industrial Co., Ltd. | Method of producing cathode active material for non-aqueous electrolyte secondary battery |
| WO1997005062A1 (en) * | 1995-08-02 | 1997-02-13 | Union Miniere S.A. | Synthesis of lithiated transition metal oxides |
| WO2023276872A1 (en) * | 2021-06-28 | 2023-01-05 | 住友化学株式会社 | Method for producing lithium metal composite oxide |
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