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.

Ultrafine SNSB_ <0.14>，SNO和SIO粉末作为锂插入的宿主在第一个周期中显示出很高的不可逆性。已经检查了含锂离子电池中复合阳极的LI_ <2.6> CO_ <0.4> N的含TIN宿主的组合。新的阳极系统降低或消除了第一个不可逆转的能力并改善周期性能。第一个固定能力是CA。 90 mAh/g li_ <2.6> co_ <0.4> n电极及其划界容量是CA。 900 mAh/g，主要是1 V vs. li的潜在高原。在第一个周期之后，li_ <2.6> co_ <0.4> n相结构从晶体变为无定形状态，但仍然可以保持超过800 mAh/g的周期容量。对于Ultrafine SNSB_X，SNO和SIO，尽管其高可逆能力从550到1300 mAh/g，但第一个周期效率通常低于65％。当将两个不同的宿主混合以形成复合电极时，第一个循环效率可以通过控制两个宿主的比率来调节。复合电极比合金和氧化物显示出更好的循环稳定性，因为电极中Li_ <2.6> co_ <0.4> N的分散会减轻由于其体积较小的膨胀而导致的体积变化效果。复合电极不仅可以用于液体电解质，还可以用于固体聚合物电解质中。

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: "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: "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, 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”

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.