Solution-combustion synthesized nickel-substituted spinel cathode materials (LiNixMn2-xO4; 0≤x≤0.2) for lithium ion battery: enhancing energy storage, capacity retention, and lithium ion transport

被引：55

作者：

Kebede, Mesfin A. ^{[1
]}

Kunjuzwa, Nikiwe ^{[1
]}

Jafta, Charl J. ^{[1
]}

Mathe, Mkhulu K. ^{[1
]}

Ozoemena, Kenneth I. ^{[1
]}

机构：

[1] CSIR, ZA-0001 Pretoria, South Africa

来源：

ELECTROCHIMICA ACTA | 2014年 / 128卷

基金：

新加坡国家研究基金会;

关键词：

LiNixMn2-xO4; Solution-combustion method; lithium ion battery; Capacity retention; Lithium ion diffusion; ELECTROCHEMICAL PERFORMANCE; STRUCTURAL-CHANGES; NI;

D O I：

10.1016/j.electacta.2013.11.080

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Spherically shaped Ni-substituted LiNixMn2-xO4 (x = 0, 0.1, 0.2) spinel cathode materials for lithium ion battery with high first cycle discharge capacity and remarkable cycling performance were synthesized using the solution-combustion technique. XRD confirmed the successful synthesis of the various spinel structures, with the Bragg diffraction peaks shifting to higher 20 angles accompanied with lattice shrinking as the Ni concentration increased. The SEM images of the spinels revealed essentially spherical morphology. Galvanostatic charge-discharge experiments showed that by substituting the pristine spinel with a low amount of nickel enhanced the cell potential (hence the energy storage capability) and greatly improved the capacity retention (ca. 99%) even after 100 cycles. Electrochemical impedance spectroscopy experiments corroborated the enhanced capacity retention as lithium ion intercalation/de-intercalation resistance for the Ni substituted spinels was significantly improved (more than a magnitude higher) compared to the pristine spinel. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：172 / 177

页数：6

共 22 条

[1] Optimizing preparation conditions for 5 V electrode performance, and structural changes in Li1-xNi0.5Mn1.5O4 spinel [J].