One-step architecture of bifunctional petal-like oxygen-deficient NiAl-LDHs nanosheets for high-performance hybrid supercapacitors and urea oxidation

作     者：Yuchen Wang Yaoyu Liu Man Zhang Biying Liu Zhiyue Zhao Kai Yan 王宇辰;刘瑶钰;张曼;刘碧莹;赵志月;严凯

作者机构：Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation TechnologySchool of Environmental Science and EngineeringSun Yat-sen UniversityGuangzhou 510275China 

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

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2022年第65卷第7期

页      码：1805-1813页

摘      要：Nickel-based layered double hydroxides(LDHs)are promising electrode materials in the fields of energy storage(supercapacitors)and conversion(urea oxidation).The rational construction of atomic and electronic structure is crucial for nickel-based LDHs to realize their satisfactory electrochemical ***,we report a facile,ecofriendly,one-step synthesis process to construct petal-like oxygen-deficient NiAl-LDH nanosheets for hybrid supercapacitors(HSCs)and urea oxidation reaction(UOR).The asprepared NiAl-LDH nanosheets with rich oxygen vacancies possess a large specific surface area of 216.6 m2 g^(-1) and a desirable electronic conductivity of 3.45×10^(–4)S cm^(-1) to deliver an ultra-high specific capacitance of 2801 F g^(-1)(700 C g^(-1))at 1 A g^(-1).Furthermore,high specific energy of 50.0 W h kg^(-1) at 400 W kg^(-1) and excellent cycle stability with 91%capacitance retention after 10,000 cycles are achieved by the NiAl-LDHs/CFP(carbon fiber paper)(+)//YP-80F(a commercial activated carbon)(–)***,NiAl-LDH nanosheets also work as an efficient electrocatalyst for UOR,which only requires 1.42 V *** hydrogen electrode to drive 10 mA cm^(–2) in 1 mol L^(-1) KOH with 0.33 mol L^(-1) *** remarkable performance is superior to most reported values of previous candidates owing to the thin structure of NiAl-LDH nanosheets for exposing more active sites and abundant oxygen *** addition,various reaction parameters are investigated to optimize the electrochemical *** general,this work paves a new way for the architecture of multifunctional nanostructured energy materials.

主 题 词：layered double hydroxides nanosheets oxygen vacancy hybrid supercapacitor urea oxidation reaction 

学科分类：080801[080801] 0808[工学-自动化类] 081705[081705] 07[理学] 070205[070205] 08[工学] 0817[工学-轻工类] 080501[080501] 0805[工学-能源动力学] 0702[理学-物理学类] 

核心收录：

D　O　I：10.1007/s40843-021-1978-3

馆 藏 号：203111389...