Enhanced electrochemical performance of nanomilling Co2SnO4/C materials for lithium ion batteries
作者： Bonan An , Qiang Ru , Shejun Hu , Xiong Song , Chang Chen
DOI: 10.1007/S11581-015-1437-8
关键词: Anode 、 Lithium 、 Ball mill 、 Conductivity 、 Amorphous solid 、 Materials science 、 Coprecipitation 、 Lithium-ion battery 、 Composite number 、 Chemical engineering
摘要: Amorphous and crystalline hybrid structure Co2SnO4/C composites have been prepared by a facile way using coprecipitation process high-energy ball milling technology. Electrochemical performance tests show that the composite anodes could maintain reversible capacity of higher than 550 mAh g−1 up to 100 cycles, much better pure Co2SnO4 (194.1 g−1). These materials also present rate with fairly stable retention when current ranges from 500 mA g−1. Impedance measurements confirm these are more beneficial for lithium diffusion compared Co2SnO4. The graphite carbon not only buffers volume expansion-related cracking but provides excellent conductivity this material.
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