Investigation on the effect of Na doping on structure and Li-ion kinetics of layered LiNi0.6Co0.2Mn0.2O2 cathode material
Huang, ZJ (Huang, Zhenjun); Wang, ZX (Wang, Zhixing); Jing, Q (Jing, Qun); Guo, HJ (Guo, Huajun); Li, XH (Li, Xinhai); Yang, ZH (Yang, Zhihua)
2016
Source PublicationELECTROCHIMICA ACTA
ISSN0013-4686
Volume192Issue:2Pages:120-126
Abstract

Introducing the Na ion into the Ni-rich LiNi0.6Co0.2Mn0.2O2, Li1-xNaxNi0.6Co0.2Mn0.2O2 (x = 0, 0.01, 0.03) has been synthesized by high-temperature solid method. The effect of Na dopants on the structure, morphology, electrochemical properties, Li ion diffusion coefficient and the activation barriers has been extensively studied. Rietveld refinement results reveal that Na doping suppress cation mixing degree effectively and enlarge Li slab space. Electrochemical testing shows that Na-doped electrodes exhibit higher initial coulombic efficiency, good capacity retention and superior rate capability. Using experiments combined with first-principles calculations, we confirmed that the Na doping has enlarged Li slab space and then made the activation barrier of Li migration be reduced resulting higher Li+ diffusion coefficients.

KeywordLithium-ion Batteries Na-doping Rate Capabilty Li-ion Diffusion Coefficient First-principle Calculation
DOI10.1016/j.electacta.2016.01.139
Indexed BySCI
WOS IDWOS:000371143600015
Citation statistics
Cited Times:41[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/4681
Collection中国科学院特殊环境功能材料与器件重点试验室
材料物理与化学研究室
Corresponding AuthorYang, ZH (Yang, Zhihua)
Affiliation1.Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
2.Shihezi Univ, Coll Sci, Dept Phys, Shihezi 832000, Peoples R China
3.Chinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, 40-1 South Beijing Rd, Urumqi 830011, Peoples R China
4.Xinjiang Key Lab Elect Informat Mat & Devices, 40-1 South Beijing Rd, Urumqi 830011, Peoples R China
5.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, 40-1 South Beijing Rd, Urumqi 830011, Peoples R China
Recommended Citation
GB/T 7714
Huang, ZJ ,Wang, ZX ,Jing, Q ,et al. Investigation on the effect of Na doping on structure and Li-ion kinetics of layered LiNi0.6Co0.2Mn0.2O2 cathode material[J]. ELECTROCHIMICA ACTA,2016,192(2):120-126.
APA Huang, ZJ ,Wang, ZX ,Jing, Q ,Guo, HJ ,Li, XH ,&Yang, ZH .(2016).Investigation on the effect of Na doping on structure and Li-ion kinetics of layered LiNi0.6Co0.2Mn0.2O2 cathode material.ELECTROCHIMICA ACTA,192(2),120-126.
MLA Huang, ZJ ,et al."Investigation on the effect of Na doping on structure and Li-ion kinetics of layered LiNi0.6Co0.2Mn0.2O2 cathode material".ELECTROCHIMICA ACTA 192.2(2016):120-126.
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