Electrochemistry of Anodes in Solid‐State Li‐Ion Polymer Batteries
Electrochemistry of Anodes in Solid‐State Li‐Ion Polymer Batteries
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DOI：
10.1149/1.1838776
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发表时间：
1998-09
影响因子：
3.9
通讯作者：
K. Zaghib;M. Armand;M. Gauthier
中科院分区：
文献类型：
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作者：
K. Zaghib;M. Armand;M. Gauthier
在60°C下使用无溶剂固体聚合物电解质进行固态锂离子电池的电化学性能的检查。我们研究了两种不同类型的阳极（负极）材料：石墨层间化合物（GIC）和锂钛氧化物（Li 4 Ti 5 O 12），并使用LiCoO 2作为阴极（正极）。天然石墨和碳纤维分别给出约372和300 mAh/g的高可逆容量。以C/15倍率放电的Li 4 Ti 5 O 12与锂电池相比，提供了155 mAh/g，对应于97%的第一循环库仑效率。当使用碳材料作为负极时，不可逆容量高。然而，当我们用尖晶石材料代替碳时，这种牺牲能力非常小。用X射线衍射分析了Li 4 Ti 5 O 12的晶体结构，用原位扫描电子显微镜证实了Li 4 Ti 5 O 12的稳定性。Li 4 Ti 5 O 12是一种零应变插入材料，具有安全、长寿命和可靠等优点。
An examination of the electrochemical performance of solid-state lithium-ion batteries was carried out using a solvent-free solid-polymer electrolyte at 60°C. We studied two different types of anode (negative electrode) material: graphite intercalation compound (GIC) or lithium-titanium oxide (Li 4 Ti 5 O 12 ), and LiCoO 2 was used as the cathode (positive electrode). Natural graphite and carbon fiber gave high reversible capacities of about 372 and 300 mAh/g, respectively. A Li 4 Ti 5 O 12 vs. lithium cell discharged at the C/15 rate delivered 155 mAh/g corresponding to a 97% first-cycle Coulombic efficiency. The irreversible capacity was high when carbon material was used as the negative electrode. However, this sacrificial capacity was very small when we replaced carbon with the spinel material. The crystallographic structure of Li 4 Ti 5 O 12 was analyzed by X-ray diffraction, and its stability was demonstrated by in situ scanning electron microscopy using Li 4 Ti 5 O 12 , which is a zero-strain insertion material that offers advantages for the solid-polymer electrolyte cell including safety, long life, and reliability.