LITHIUM-TRANSITION NITRIDE SYSTMES FOR THE ELECTRODE OF LITHIUM SECONDARY BATTERY

锂二次电池电极用锂过渡氮化物体系

• 批准号: 07455337
• 负责人: TAKEDA Yasuo
• 金额: $ 4.8万
• 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: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07455337/
• 关键词: LITHIUM SECONDARY BATTERY; ANODE MATERIAL; LI-INTERCALATION; LITHIUM NITRIDE; LITHIUM TRANSITION METAL NITRIDE; リチウムチッ化物; リチウム二次電池用負極; 新規負極; リチウム二次電磁用負極; 逆ホタル石構造

We have prepared a series of compounds in Li-M-N (M=Co, Ni, Cu) systems and found that they show remarkable electrode properties for a lithium secondary battery, especially as the anode material.Lithium transition metal nitrides, Li_<3-x>M_xN (M=Co, Ni, Cu), were synthesized from Li_3N and metallic powder under a N_2 gas stream. Metal ions are substituted for the Li site in the range of 0*x*0.5,0*x*0.6, and 0*x0.3 for M=Co, Ni, and Cu, respectively.Li/Li_<3-x-z>M_xN cells were sycled in the range of 0*z1.0 and showed a high capacity of 900mAh/g in Li_<2.6-z>Co_<0.4>N,and 750mAh/g in Li_<.6-z>Cu_<0.4>N,but only 200mAh/g in Li_<2.5-z>Ni_<0.5>N.The high capacity in M=Co and Cu was due to the amorphous phase formed during the 1st charge, which shows good reversibility and low potential to Li metal (0.5V in average).The crystalline Li_<3-x-z>M_xN (M=Co and Cu) can deintercalate and intercalate Li ions only in the limited z range. On the contrary, Li ion is deintercalated and intercalated in Li_<3-x-z>Ni_xN more widely (at least z-0.5) showing small change of the cell volume. Li_<3-x>M_xN (M=Co and Cu) is thus suggested to be a good candidate for an anode in a lithium secondary battery because of their good reverisibility and low voltage in Li/Li_<3-x>M_xN cells.

在Li-M-N(M=Co，Ni，Cu)体系中制备了一系列化合物，发现它们在锂二次电池中表现出优异的电极性能，特别是作为负极材料。金属离子在0*x*0.5、0*x*0.6和0*x0.3范围内分别取代了Co、Ni和Cu。Li/Li_&lt；3-x-z&gt；M_xN电池在0*z1.0范围内组装，在Li_&lt；2.6-z&gt；Co_&lt；0.4&gt；N和Li_&lt；.6-z&gt；Cu_&lt；0.4&gt；N，但Li_&lt；2.5-z&gt；Ni_&&lt；0.5&gt；n的容量仅为200mAh/g。M=Co和Cu的高容量是由于在第一次充电时形成的非晶相，对Li金属表现出良好的可逆性和低的电势(平均0.5V)。晶态Li_&lt；3-x-z&gt；M_xN(M=Co和Cu)只能在有限的z范围内脱嵌和嵌入Li离子。相反，Li离子在Li_&lt；3-x-z&gt；Ni_xN中脱嵌和插层范围更广(至少z-0.5)，晶胞体积变化不大。由于Li/Li&lt；3-x&gt；3-x&gt；M_xN(M=Co和Cu)具有良好的可逆性和较低的电池电压，因此Li_&lt；3-x&gt；M_xN是锂二次电池的理想负极。

项目成果

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K.Ada 等人：“使用混合碱性水热法制备具有 α-NaFeO 型结构的 LiFeO_2”J.Electrochem.Soc.144 (1997)。

M.Nishijima 他: "Electrochemical Studies of a New Anode Materials,Li_<3-X>M_XN(M=Co,Ni,Cu)" J.Power Sauces.68. 510-514 (1997)

M.Nishijima 等人：“新型阳极材料的电化学研究，Li_<3-X>M_XN(M=Co,Ni,Cu)”J.Power Sauces.68 (1997)。

R.Kanno, T.Shirane, Y.Kawamoto, Y.Takeda, M.Takano, M.Ohashi and Y.Yamaguchi: "Synthesis, Structure, and Electrochemical Properties of a New Lithium Iron Oxide, LiFeO_2, with a Corrugated Layr Structure" J.Eelctrochem.Soc.143. 2435-2442 (1996)

R.Kanno、T.Shirane、Y.Kawamoto、Y.Takeda、M.Takano、M.Ohashi 和 Y.Yamaguchi：“具有波纹层状结构的新型氧化铁锂 LiFeO_2 的合成、结构和电化学性能

M.Nishijima: "Electrochemical studies of a new anode materials,Li_<3-x>M_xN(M=Co,Ni,Cu)" J.Power Source. (印刷中).

M.Nishijima：“新型阳极材料 Li_<3-x>M_xN(M=Co,Ni,Cu) 的电化学研究”J.Power Source（正在出版）。

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O. Yamamoto 等人：“可充电碳阳极”J. Power Sources 54. 72-75 (1995)