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锡以其高的理论储锂容量(994 mAh/g)引起了人们的极大关注。Sn的质量比容量是现用碳负极的2倍左右,体积比容量为现用碳负极的3倍以上,其脱嵌锂电位略高于碳电极而具有相对较高的安全性,因而Sn基合金成为一类非常有发展潜力的高比容量锂离子电池负极材料。为了解决Sn基合金脱嵌锂过程中体积变化大、首次进而导致循环性能不稳定,以及首次不可逆容量高、库仑效率低等问题,本研究通过固相还原法制备了具有内微孔和纳/微复合结构的Sn基系列合金负极材料,材料的比容量>500 mAh/g;具有很好的循环稳定性。该方法成本低、工艺简单、便于规模化生产。该材料的实际应用将会促使高性能锂离子电池的更新换代,进而促进我..... [Detail]
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