聚吡咯/LiMn2O4复合阴极增强锂二次电池电化学性能

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Pub Date : 2001-10-01 DOI:10.1080/10587250108024753

J. Kim, Yongseon Hwang, Young Taek Kim, Kitae Song, B. Cho, H. Rhee

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引用次数: 0

摘要

摘要以十二烷基苯磺酸为掺杂剂，将吡咯在LiMn2O4上化学氧化制备聚吡咯/LiMn2O4复合材料。聚合主要发生在LiMn2O4的表面，从而得到完全包覆的LiMn2O4颗粒。当活性材料中PPy含量为4.1 wt%时，电池容量达到124 mAh/g的最大值。与纯LiMn2O4电池相比，复合电池具有更强的充放电性能。聚吡啶能提高LiMn2O4的电子交换能力，稳定其结构。

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Enhanced Electrochemical Properties of Li Secondary Batteries Using Polypyrrole/LiMn2O4 Composite Cathodes

Abstract Polypyrrole(PPy)/LiMn2O4 composites were prepared by chemical oxidation of pyrrole onto LiMn2O4 with dodecylbenzene sulfonate as a dopant. The polymerization occurred mainly on the surface of LiMn2O4 to yield the entirely coated LiMn2O4 particles. The capacity of the cell reached the maximum of 124 mAh/g at 4.1 wt% of PPy in the active material. The composite cell showed enhanced charge-discharge properties compared with a pure LiMn2O4 cell. The PPy may enhance the electron exchange ability and stabilize the structure of LiMn2O4.

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来源期刊

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals

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