Investigation of W6+-doped in high-nickel LiNi0.83Co0.11Mn0.06O2 cathode materials for high-performance lithium-ion batteries

Jiale Wang; Chengjin Liu; Qing Wang; Guanli Xu; Chang Miao; Mingbiao Xu; Changjun Wang; Wei Xiao

doi:10.1016/j.jcis.2022.08.085

Investigation of W⁶⁺-doped in high-nickel LiNi_0.83Co_0.11Mn_0.06O₂ cathode materials for high-performance lithium-ion batteries

J Colloid Interface Sci. 2022 Dec 15;628(Pt B):338-349. doi: 10.1016/j.jcis.2022.08.085. Epub 2022 Aug 17.

Authors

Jiale Wang¹, Chengjin Liu², Qing Wang³, Guanli Xu⁴, Chang Miao², Mingbiao Xu⁵, Changjun Wang⁵, Wei Xiao⁶

Affiliations

¹ College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, 434023, PR China; Hebei Key Laboratory of Dielectric and Electrolyte Functional Material, Northeastern University at Qinhuangdao, Qinhuangdao 066004, PR China; Hubei Collaborative Innovation Center of Unconventional Oil and Gas, Yangtze University, Wuhan 434000, PR China.
² College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, 434023, PR China.
³ Hebei Key Laboratory of Dielectric and Electrolyte Functional Material, Northeastern University at Qinhuangdao, Qinhuangdao 066004, PR China.
⁴ College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, 434023, PR China; Hebei Key Laboratory of Dielectric and Electrolyte Functional Material, Northeastern University at Qinhuangdao, Qinhuangdao 066004, PR China.
⁵ College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, 434023, PR China; Hubei Collaborative Innovation Center of Unconventional Oil and Gas, Yangtze University, Wuhan 434000, PR China.
⁶ College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, 434023, PR China; Hebei Key Laboratory of Dielectric and Electrolyte Functional Material, Northeastern University at Qinhuangdao, Qinhuangdao 066004, PR China. Electronic address: xwylyq2006@126.com.

PMID: 35998459
DOI: 10.1016/j.jcis.2022.08.085

Abstract

WO₃ as tungsten dopant is introduced into lithium nickel cobalt manganese (LiNi_0.83Co_0.11Mn_0.06O₂, NCM) layered oxide powders to synthesize W⁶⁺-doped NCM cathode materials during the lithiation process of the hydroxide precursor. Introducing W⁶⁺ into the lattice can lead to the diversities of the crystal structure, surface morphology, and electrochemical performance. The crystal structure confirmed by X-ray diffraction indicates that the W⁶⁺-doped oxide powders present a typical R-3m layered structure with larger interplanar distance and cell volume. Also, scanning electron microscope images reveal that the primary particles shrink forming a tighter surface under the effect of W⁶⁺, while the specific changes gradually aggravate with increase in the content of W⁶⁺ added. The excellent electrochemical stability of W⁶⁺-doped samples is observed, as the stable host structure is reinforced by the strong W-O bond. The stable structure does not only inhibit the anisotropic volume change caused by repetitive H2 ⇔ H3 phase transitions, but also sustains the integrated structure to impede the formation of microcracks and the appearance of more side reactions. This research provides an effective route on investigating the potential association between electrochemical performance and structure change for W⁶⁺-doped strategy.

Keywords: High-nickel cathode; Layered oxide; Lithium-ion battery; Structural stability; W(6+)-doped.