In situ growth of hydrophilic nickel-cobalt layered double hydroxides nanosheets on biomass waste-derived porous carbon for high-performance hybrid supercapacitors

作     者：Yuchen Wang Yaoyu Liu Zuo Chen Man Zhang Biying Liu Zhenhao Xu Kai Yan Yuchen Wang;Yaoyu Liu;Zuo Chen;Man Zhang;Biying Liu;Zhenhao Xu;Kai Yan

作者机构：School of Environmental Science and EngineeringSun Yat-sen UniversityGuangzhou510275China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation TechnologyGuangzhou510275China 

出 版 物：《Green Chemical Engineering》 (绿色化学工程（英文）)

年 卷 期：2022年第3卷第1期

页      面：55-63页

核心收录：

学科分类：081702[工学-化学工艺] 080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 

基　　金：the financial supports from Key-Area Research and Development Program of Guangdong Province(2019B110209003) National Natural Science Foundation of China(21776324,22078374) Guangdong Basic and Applied Basic Research Foundation(2019B1515120058,2020A1515011149) National Key R&D Program of China(2018YFD0800703,2020YFC1807600) National Ten Thousand Talent Plan,the Fundamental Research Funds for the Central Universities(19lgzd25) Hundred Talent Plan(201602)from Sun Yat-sen University。 

主　　题：Layered double hydroxides Nanosheets Biomass-derived porous carbon Wettability Hybrid supercapacitor 

摘      要：Rational design and cost-effective fabrication of layered double hydroxides(LDHs)nanosheets with extraordinary electrochemical performance is a key challenge for hybrid supercapacitors(HSCs).Herein,we report a facile in situ growth methodology to eco-friendly synthesize hydrophilic Ni Co-LDHs nanosheets on biomass waste-derived porous carbon(BC)for robust high-performance HSC cathode.The in situ growth process under ultrasonication realizes the rational arrangement of Ni Co-LDHs nanosheets on the surface of BC,which effectively increases the specific surface area,promotes the electronic conductivity and enhances the wettability of Ni Co-LDHs nanosheets without affecting their thickness values.With the beneficial effects of ultrathin thickness of LDHs nanosheets(6.20 nm),large specific surface area(2324.1 m^(2)g^(-1)),low charge transfer resistance(1.65Ω),and high wettability with electrolyte(34°–35°),the obtained Ni2Co1-LDHs/BC50 electrode possesses an ultra-high specific capacitance of 2390 F g^(-1)(956 C g^(-1))at 1 A g^(-1),which is superior to most reported values.Furthermore,an assembled Ni_(2)Co_(1)-LDHs/BC50//YP-80F HSC delivers a maximum specific energy of 52.47 Wh kg^(-1)at375 W kg^(-1),and maintains a high capacitance retention of 75.9%even after 4000 cycles.This work provides a facile approach to fabricate LDHs nanosheets based cathode materials for high-performance HSCs.