Enhanced electrochemical performance of LiNi0.8Co0.1Mn0.1O2 via titanium and boron co-doping. Issue 3 (1st February 2021)

• Record Type: Journal Article
• Authors: Zhu, Fangjun; Shi, You; Hu, Guorong; Peng, Zhongdong; Cao, Yanbing; Sun, Qian; Xue, Zhichen; Zhang, Yinjia; Du, Ke
• Is Part Of: Ceramics international. Volume 47:Issue 3(2021)
• Page Start: 3070
• Page End: 3078
• Publication Date: 2021-02-01
• Subjects: Ti and B doping -- LiNi0.8Co0.1Mn0.1O2 -- Crystal structure -- Electrochemical performance; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.09.143
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Titanium and boron are simultaneously introduced into LiNi0.8 Co0.1 Mn0.1 O2 to improve the structural stability and electrochemical performance of the material. X-ray diffraction studies reveal that Ti 4+ ion replaces Li + ion and reduces the cation mixing; B 3+ ion enters the tetrahedron of the transition metal layers and enlarges the distance of the [LiO6 ] layers. The co-doped sample has spherical secondary particles with elongated and enlarged primary particles, in which Ti and B elements distribute uniformly. Electrochemical studies reveal the co-doped sample has improved rate performance (183.1 mAh·g -1 at 1 C and 155.5 mAh·g -1 at 10 C) and cycle stability (capacity retention of 94.7% after 100 cycles at 1 C). EIS and CV disclose that Ti and B co-doping reduces charge transfer impedance and suppresses phase change of LiNi0.8 Co0.1 Mn0.1 O2.