Structural, electrical and electrochemical studies of LiNi$_{0.4}M_{0.1}$Mn$_{1.5}$O$_4$ ($M$ = Co, Mg) solid solutions for lithium ion battery

Bulletin of materials science

G P NAYAKA³  K V PAI³  J MANJANNA²  P PERIASAMY⁴  V S TRIPATHI¹  K C ANJANEYA³ 

[1] Chemistry Group, Bhabha Atomic Research Centre, Mumbai 400 085, India$$Chemistry Group, Bhabha Atomic Research Centre, Mumbai 400 085, IndiaChemistry Group, Bhabha Atomic Research Centre, Mumbai 400 085, India$$;Department of Chemistry, Rani Channamma University, Belagavi 591 156, India$$Department of Chemistry, Rani Channamma University, Belagavi 591 156, IndiaDepartment of Chemistry, Rani Channamma University, Belagavi 591 156, India$$;Department of Industrial Chemistry, Kuvempu University, Shankaraghatta 577 451, India$$Department of Industrial Chemistry, Kuvempu University, Shankaraghatta 577 451, IndiaDepartment of Industrial Chemistry, Kuvempu University, Shankaraghatta 577 451, India$$;Central Electrochemical Research Institute, Karaikudi 630 006, India$$Central Electrochemical Research Institute, Karaikudi 630 006, IndiaCentral Electrochemical Research Institute, Karaikudi 630 006, India$$

关键词: Lithium ion batteries;    positive electrode;    LiNi$_{0.4}M_{0.1}$Mn$_{1.5}$O$_4$-based spinels;    solâ€�?�gel method;    charge/discharge.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The LiNi$_{0.4}M_{0.1}$Mn$_{1.5}$O$_4$ ($M$ = Co, Mg) solid solutions are synthesized by citric acid assisted sol�?�gel method and characterized by using TG/DTA, XRD, FTIR, EPR and SEM. The electrochemical characterization is carried out using CR-2032 coin type cell configuration. The cyclic voltammogram shows two pairs of redox current peaks, 4.35/3.80 V and 4.90/4.37 V vs. Li in a typical case of Co-doped sample, ascribed to two-step reversible intercalation of Li. A.c.-impedance (Nyquist plot) shows high frequency semicircle and a sloping line in the low frequency region. The semicircle is ascribed to Li-ion migration through interface from the surface layer of the particlesto electrolyte. The LiNi$_{0.4}Co_{0.1}$Mn$_{1.5}$O$_4$ shows reasonably good capacity retention in 20 cycles of galvanostatic charge/discharge cycling.

【 授权许可】

Unknown