LiNi1/3Co1/3Mn1/3O2/polypyrrole composites as cathode materials for high‐performance lithium‐ion batteries. (3rd November 2019)

• Record Type: Journal Article
• Authors: Zhu, Limin; Xie, Lingling; Bao, Chenguang; Yan, Xiangyang; Cao, Xiaoyu
• Is Part Of: International journal of energy research. Volume 44:Number 1(2020)
• Page Start: 298
• Page End: 308
• Publication Date: 2019-11-03
• Subjects: improved electrochemical properties -- LiNi1/3Co1/3Mn1/3O2/polypyrrole -- lithium‐ion batteries -- ultrasound dispersion method; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.4916
• Languages: English
• ISSNs: 0363-907X

Abstract

Summary: Polypyrrole is successfully introduced to enhance the reaction stability and ionic conductivity of LiNi1/3 Co1/3 Mn1/3 O2 material through an ultrasound dispersion method and applied as cathode materials for lithium‐ion batteries. This polymer can significantly advance the electrochemical properties. Expectedly, the 8 wt.% LiNi1/3 Co1/3 Mn1/3 O2 /polypyrrole composite has lower mixing degree of Li + /Ni 2+, higher c / a value, which delivers the first discharge capacity of 199.2 mAh g −1, which abate to 121.3 mAh g −1 in the 300th cycle at 0.2 C between 2.5 and 4.5 V. Even at 3 C, it continues to reveal a reversible capacity of 86.4 mAh g −1 after 100 cycles. All the consequences implied that the 8 wt.% LiNi1/3 Co1/3 Mn1/3 O2 /polypyrrole verified a minor charge transfer resistance and better Li + diffusion ability, hence establishing preferable rate and cycling performance compared with the primordial LiNi1/3 Co1/3 Mn1/3 O2 . Abstract : In this work, LiNi1/3 Co1/3 Mn1/3 O2 /polypyrrole composites have been successfully prepared through an ultrasound dispersion method and applied as high‐performance cathode materials for lithium‐ion batteries. Expectedly, the 8 wt.% LiNi1/3 Co1/3 Mn1/3 O2 /polypyrrole composite displays superior phase structure and electrochemical kinetics, delivers the first discharge capacity of 199.2 mAh g −1, and remains at 121.3 mAh g −1 after 300 cycles at the current density of 0.2 C in the voltage range of 2.5 to 4.5 V. Even at a high of 3 C, it continues to reveal a reversible capacity of 86.4 mAh g −1 after 100 cycles. This study provides significant insights into the design of novel inorganic electrode materials in combination with conducting polymers as candidate composite electrode materials for high‐performance lithium‐ion batteries application.