Hierarchical Co-Ni layered double hydroxide decorated on hollow carbon spheres from wood for high-performance supercapacitors. (1st March 2023)

• Record Type: Journal Article
• Authors: Ma, Xiaojun; Guo, Ranran; Qiu, Yujuan; Yang, Zhaozhao; Li, Dongna
• Is Part Of: Journal of wood chemistry and technology. Volume 43:Number 2(2023)
• Page Start: 59
• Page End: 66
• Publication Date: 2023-03-01
• Subjects: Hollow carbon spheres -- wood -- CoNiLDHs -- supercapacitor; Wood -- Chemistry -- Periodicals; Wood; Wood -- Chemistry; Periodicals; 674.13
• DOI: 10.1080/02773813.2023.2182888
• Languages: English
• ISSNs: 0277-3813

Abstract

Abstract: In this work, hollow carbon spheres from wood (WHCS) were prepared by liquefaction, emulsification, half-curing, carbonization and activation steps. Then, Co-Ni layered double hydroxide nanosheets (CoNiLDHs) were grown on the surface of hollow carbon spheres, forming a CoNiLDHs/WHCS composite with a core–shell structure. Benefitting from the excellent electrochemical activity of CoNiLDHs and the high surface area of WHCS, CoNiLDHs/WHCS electrode exhibited a high specific capacitance and excellent stability. Compared with WHCS and CoNiLDHs, the specific capacitance of CoNiLDHs/WHCS (∼1205.24 Fg −1 ) composite exhibited a superior retention rate (∼71.09% at 10 Ag −1 ) and excellent cycling stability (87.5% after 5000 cycles at 10 Ag −1 ). The synthesized CoNiLDHs/WHCS composite is a promising electrode material for developing high-performance supercapacitors.