当前位置: X-MOL 学术J. Phys. Energy › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Nanoscale differentiation of surfaces and cores for olivine phosphate particles—a key characteristic of practical battery materials
Journal of Physics: Energy ( IF 7.0 ) Pub Date : 2021-04-13 , DOI: 10.1088/2515-7655/abe2f5
Y Zhang , J A Alarco , M Khosravi , I D R Mackinnon

We provide a review of our recent studies on the surface chemistries and electronic structures of olivine phosphate cathode materials LiMPO4 (M = Mn, Fe, Co, Ni). Li-depletion and mixed oxidation for the transition metal ions have been detected on particle surfaces, across the family of metal phosphate cathode materials. The effects of surface Li-depletion on optical properties and electronic band structures are discussed. LiFePO4 doped with metals or ions that are reported in the literature as beneficial for rate capability enhancement show more pronounced surface Li-depletion and mixed oxidation compared to undoped material. This outcome, among others, indicates that the dopant resides predominantly on, and influences, the surface of cathode materials.



中文翻译:

橄榄石磷酸盐颗粒表面和核的纳米级分化——实用电池材料的一个关键特征

我们回顾了我们最近对橄榄石磷酸盐正极材料 LiMPO 4(M = Mn、Fe、Co、Ni)的表面化学和电子结构的研究。在整个金属磷酸盐正极材料系列中,已在颗粒表面检测到过渡金属离子的锂消耗和混合氧化。讨论了表面锂耗尽对光学特性和电子能带结构的影响。文献中报道的掺杂有金属或离子的LiFePO 4有利于提高倍率能力,与未掺杂的材料相比,LiFePO 4显示出更明显的表面锂耗尽和混合氧化。除其他外,该结果表明掺杂剂主要存在于并影响阴极材料的表面。

更新日期:2021-04-13
down
wechat
bug