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电化学  2010 

锂离子电池正极材料Li_2MnSiO_4固体核磁共振谱研究

, PP. 296-299

Keywords: Li2MnSiO4,固体核磁共振,正极材料,锂离子电池

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Abstract:

应用水热-溶胶凝胶法合成了Li2MnSiO4正极材料.由XRD、FTIR、固体NMR及恒流充放电等方法表征、分析样品的相组成、晶体结构和电化学性能.结果表明,合成的样品主相为Li2MnSiO4,同时存在少量Li2CO3杂质.该材料的首次放电容量可达190mAh·g-1,但在充放电循环过程中由于结构坍塌、分解导致其容量衰退明显.

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