熔融浸渍法提高尖晶石锰酸锂循环性能
Enhanced cycle stability of spinel LiMn2O4 by a melting impregnation method
采用熔融浸渍法，分别用CuO，MgO，ZnO，Al2O3和CeO2对尖晶石锰酸锂颗粒进行了表面包覆。除了CeO2包覆的试样之外，其他试样的循环性能都有了不同程度的提高，其中ZnO包覆的试样表现出最好的循环性能，在55oC高温循环100次后，容量仍保持在100 mAh g-1，而未经处理的锰酸锂容量只剩下80 mAh g-1。循环稳定性能的提高是源于颗粒表面氧化物对锰酸锂颗粒的保护作用，以及对电解液中HF的吸收。
In this paper, CuO, MgO, ZnO, Al2O3 and CeO2 coated spinal LiMn2O4 were successfully synthesized using a melting impregnation method. Except the CeO2 coated sample, all the others exhibit better capacity retention than bare LiMn2O4 at both room temperature and 55C. Among these samples, the ZnO coated sample showed the best capacity retention, a capacity of 100 mAh g-1 was obtained after 100 cycles at 55ºC while the capacity of bare LiMn2O4 remains only 80 mAh g-1. The improvement of the capacity retention is attributed to the suppressed Mn dissolution caused by HF.
赵新兵、齐好、曹高劭
材料科学电化学工业
熔融浸渍，LiMn2O4，表面包覆，金属氧化物，循环性能
melting impregnation method LiMn2O4 coating metal-oxide cycle stability
赵新兵,齐好,曹高劭.熔融浸渍法提高尖晶石锰酸锂循环性能[EB/OL].(2008-05-02)[2025-08-18].http://www.paper.edu.cn/releasepaper/content/200805-13.点此复制
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