Hierarchical Co-Ni layered double hydroxide decorated on hollow carbon spheres from wood for high-performance supercapacitors

IF 1.7 4区 农林科学 Q2 MATERIALS SCIENCE, PAPER & WOOD Journal of Wood Chemistry and Technology Pub Date : 2023-03-01 DOI:10.1080/02773813.2023.2182888
Xiaojun Ma, Ranran Guo, Yujuan Qiu, Zhaozhao Yang, Dongna Li
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引用次数: 1

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.
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用于高性能超级电容器的木质空心碳球上修饰的分级Co-Ni层状双氢氧化物
摘要本工作通过液化、乳化、半固化、碳化和活化等步骤制备了木质空心碳球。然后,在空心碳球表面生长Co-Ni层状双氢氧化物纳米片(CoNiLDHs),形成具有核壳结构的CoNiLDHs/WHCS复合材料。得益于CoNiLDHs优异的电化学活性和WHCS的高表面积,CoNiLDHs/WHCS电极表现出高的比电容和优异的稳定性。与WHCS和CoNiLDHs相比,CoNiLDHs/WHCS的比电容(~1205.24 Fg−1)复合材料表现出优异的保留率(在10 Ag−1)和优异的循环稳定性(在10 Ag−1)。合成的CoNiLDHs/WHCS复合材料是开发高性能超级电容器的一种很有前途的电极材料。
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来源期刊
Journal of Wood Chemistry and Technology
Journal of Wood Chemistry and Technology 工程技术-材料科学:纸与木材
CiteScore
3.70
自引率
20.00%
发文量
37
审稿时长
3 months
期刊介绍: The Journal of Wood Chemistry and Technology (JWCT) is focused on the rapid publication of research advances in the chemistry of bio-based materials and products, including all aspects of wood-based polymers, chemicals, materials, and technology. JWCT provides an international forum for researchers and manufacturers working in wood-based biopolymers and chemicals, synthesis and characterization, as well as the chemistry of biomass conversion and utilization. JWCT primarily publishes original research papers and communications, and occasionally invited review articles and special issues. Special issues must summarize and analyze state-of-the-art developments within the field of biomass chemistry, or be in tribute to the career of a distinguished researcher. If you wish to suggest a special issue for the Journal, please email the Editor-in-Chief a detailed proposal that includes the topic, a list of potential contributors, and a time-line.
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