一种用于可充电钠电池的具有高能量/功率密度的新型O3型层状氧化物阴极。

A new O3-type layered oxide cathode with high energy/power density for rechargeable Na batteries.

作者信息

Liu Haodong, Xu Jing, Ma Chuze, Meng Ying Shirley

机构信息

Department of NanoEngineering, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.

出版信息

Chem Commun (Camb). 2015 Mar 18;51(22):4693-6. doi: 10.1039/c4cc09760b.

DOI:10.1039/c4cc09760b

PMID:25692397

Abstract

A new O3-Na(0.78)Li(0.18)Ni(0.25)Mn(0.583)O(w) is prepared as the cathode material for Na-ion batteries, delivering exceptionally high energy density and superior rate performance. The single-slope voltage profile and ex situ synchrotron X-ray diffraction data demonstrate that no phase transformation happens through a wide range of sodium concentrations (up to 0.8 Na removed). Ni(2+)/Ni(4+) is suggested to be the main redox center. Further optimization could be realized by tuning the combination and the ratio of transition metals.

摘要

一种新型的O3-Na(0.78)Li(0.18)Ni(0.25)Mn(0.583)O(w)被制备作为钠离子电池的阴极材料，具有极高的能量密度和优异的倍率性能。单斜率电压曲线和非原位同步辐射X射线衍射数据表明，在很宽的钠浓度范围内（高达0.8个钠被脱出）没有发生相变。Ni(2+)/Ni(4+)被认为是主要的氧化还原中心。通过调整过渡金属的组合和比例可以实现进一步的优化。