Tsinghua University Press;Berlin/Heidelberg: Tsinghua University Press
摘要:
摘要： Since the high-voltage spinel LiNi 0.5 Mn 1.5 O 4 (LNMO) is one of the most attractive cathode materials for lithium-ion batteries, how to improve the cycling and rate performance simultaneously has become a critical question. Nanosizing is a typical strategy to achieve high rate capability due to drastically shortened Li-ion diffusion distances. However, the high surface area of nanosized particles increases the side reaction with the electrolyte, which leads to poor cycling performance. Spinels with disordered structures could also lead to improved rate capability, but the cyclability is low due to the presence of Mn 3+ ions. Herein, we systematically investigated the synergic interaction between particle size and cation ordering. Our results indicated that a microsized disordered phase and a nanosized ordered phase of LNMO materials exhibited the best combination of high rate capability and cycling performance. 其他題名： Nano Res 出版者： Berlin/Heidelberg: Tsinghua University Press 出版日期： 2013-09 出處： Nano Research, 2013-09, Vol.6 (9), p.679-687 版權： Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2013 識別號： ISSN: 1998-0124 識別號： EISSN: 1998-0000 識別號： DOI: 10.1007/s12274-013-0343-5
