Study on the Novel Anode for Anode for Advanced Lithium Secondary Batteries

先进锂二次电池负极新型负极的研究

• 批准号: 11555237
• 负责人: TAKEDA Yasuo
• 金额: $ 8.51万
• 依托单位: Mie University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555237/
• 关键词: Lithium secondary Battery; High capacity anode; Lithium alloy anode; Lithium transition metal nitride; Composite electrode; リチウム窒化物; スズ系合金; 固体ポリマー電解質; ポリマーリチウム二次電池; 一酸化スズ; 一酸化ケイ素; リチウムチッ化物; 負極材料; リチウム合金負極; 固体高分子リチウム電池

Ultrafine SnSb_<0.14>, SnO and SiO powders as hosts for lithium insertion show high irreversibility in the first cycle. A combination of the tin-containing hosts with Li_<2.6>Co_<0.4>N has been examined for composite anodes in lithium ion batteries. The new anode systems reduce or eliminate the first irreversible capacity and improve the cycle performances.The first lithiation capacity is ca. 90 mAh/g for Li_<2.6>Co_<0.4>N electrode and its delithiation capacity is ca. 900 mAh/g, mostly at the potential plateau of 1 V vs. Li. After the first cycle, Li_<2.6>Co_<0.4>N phase structure changes from crystalline to amorphous state, but a cycle capacity over 800 mAh/g can still be kept. For ultrafine SnSb_x, SnO and SiO, the first cycle efficiency is generally below 65 % in spite of their high reversible capacities from 550 to 1300 mAh/g. When the two different hosts are mixed to form a composite electrode, the first cycle efficiency becomes adjustable by controlling the ratio of the two hosts. The composite electrodes show a better cycle stability than the alloy and oxides, because a dispersion of Li_<2.6>Co_<0.4>N in the electrodes alleviates the volume change effect due to its small volume expansion. The composite electrodes can be used not only in liquid electrolytes, but also in solid polymer electrolytes.

超细SnSb_<0.14>， SnO和SiO粉末作为锂插入主体在第一次循环中表现出较高的不可逆性。研究了锂离子电池复合阳极中含锡主体与Li_<2.6>Co_<0.4>N的组合。新的阳极系统减少或消除了第一不可逆容量，提高了循环性能。对于锂离子浓度<2.6>Co_<0.4>N的电极，其首次锂化容量约为90 mAh/g，其衰减容量约为900 mAh/g，主要发生在1 V vs. Li的电位平台上。第一次循环后，Li_<2.6>Co_<0.4>N相结构由晶态变为非晶态，但仍能保持800 mAh/g以上的循环容量。对于超细SnSb_x， SnO和SiO，尽管它们的可逆容量很高，从550到1300 mAh/g，但第一次循环效率通常低于65%。当两种不同的主体混合形成复合电极时，通过控制两主体的比例可以调节第一循环效率。由于Li_<2.6>Co_<0.4>N在电极中的分散，其体积膨胀小，减轻了体积变化效应，复合电极的循环稳定性优于合金和氧化物。复合电极不仅可用于液体电解质，也可用于固体聚合物电解质。

项目成果

Y.Takeda: "Lithium Secondary Batteries using a Lithium Cobalt Nitride, Li_<2.6>Co_<0.4>N, as the Anode"Solid State Ionics. (印刷中).

Y.Takeda：“使用锂钴氮化物 Li_<2.6>Co_<0.4>N 作为阳极的锂二次电池”固态离子学（正在出版）。

J.Yang: "Morphology Modification and Irreversibility Compensation for SnO Anodes"J. Power Sources. 97/98. 216-218 (2001)

J.Yang：“SnO阳极的形貌改性和不可逆性补偿”J.

J.Yang: "SnSb_x-based composite electrodes for lithium ion cells"Solid State Ionics. 135. 175-180 (2000)

J.Yang：“锂离子电池用SnSb_x基复合电极”，Solid State Ionics。

J.Yang: "Solid Polymer Electrolyte Cells using SnSb/Li_<2.6>Co_<0.4>N Composite anodes"J. Power Sources. 97/98. 779-781 (2001)

J.Yang：“使用SnSb/Li_<2.6>Co_<0.4>N复合阳极的固体聚合物电解质电池”J.

J. Yang, Y. Takeda, Q. Li, N. Imanishi and O. Yamamoto: "Solid Polymer Electrolyte Cells using SnSb/Li_<2.6>Co_<0.4>N Composite anodes"J. Power Sources. 97-98. 779-781 (2001)

J. Yang、Y. Takeda、Q. Li、N. Imanishi 和 O. Yamamoto：“使用 SnSb/Li_<2.6>Co_<0.4>N 复合阳极的固体聚合物电解质电池”