摘要
开发具有离子/电子传输速度快,表面化学可调的可再生、低成本、环保的电极材料是目前储能器件发展的迫切需要。近年来,生物质碳材料因其低成本、可再生、循环性能好等优点备受关注,但其比电容和能量密度较低影响了其实际应用。在此,将生物质废弃物转化为具有良好化学性质的碳材料,并通过杂原子掺杂生物质碳材料与过渡金属氧化物Fe_(2)O_(3)进行复合,利用Fe_(2)O_(3)与氮掺杂碳的互补优势,以一步碳化法制备出Fe_(2)O_(3)/氮掺杂生物质碳(NBCs)复合材料,表现出优异的电化学性能。结果表明:Fe_(2)O_(3)/NBCs作为负极材料在1 A·g^(-1)电流密度下的比电容为575 F·g^(-1)。同时,将Fe_(2)O_(3)/NBCs-700℃和NiCoFe-P分别为负极和正极材料组装成不对称超级电容器,在功率密度为800 W·kg^(-1)的情况下,能量密度达到33.3 W·h·kg^(-1)。组装的不对称超级电容器还表现出优异循环稳定性,经过3500次循环后仍保持82.4%的电容。因此,Fe_(2)O_(3)/NBCs作为负极电极材料,是极具有前途的超级电容器电极材料。
The development of renewable,low-cost and environmentally friendly electrode materials with fast ion/electron transfer rate and adjustable surface chemistry is an urgent need for the development of current energy storage devices.In recent years,biomass carbon materials have attracted much attention because of their low cost,renewable and good cycling performance,but their low specific capacitance and energy density affect their practical applications.Here,the biomass waste was transformed into carbon materials with good chemical properties,and the transition metal oxide Fe_(2)O_(3)was composite by heteroatom-doped biomass carbon materials,taking advant-age of the complementary strengths of Fe_(2)O_(3)and nitrogen doped carbon was used to prepare Fe_(2)O_(3)/nitrogendoped biomass carbon(NBCs)composite materials by one-step carbonization,showing excellent electrochemical performance.The results show that the specific capacitance of Fe_(2)O_(3)/NBCs as the negative electrode material is 575 F·g^(-1)at a current density of 1 A·g^(-1).At the same time,Fe_(2)O_(3)/NBCs-700℃and NiCoFe-P were used as cathode and cathode materials respectively to assemble asymmetric supercapacitors,achieves an energy density of 33.3 W·h·kg^(-1)at a power density of 800 W·kg^(-1).The assembled asymmetric supercapacitors also exhibit excellent cycling stability,maintaining 82.4%capacitance after 3500 cycles.Therefore,Fe_(2)O_(3)/NBCs is a promising electrode material for supercapacitors as negative electrode materials.
作者
魏帅
李朝霞
孟淑娟
朱星臣
卢新宇
苏琼
王彦斌
WEI Shuai;LI Zhaoxia;MENG Shujuan;ZHU Xingchen;LU Xinyu;SU Qiong;WANG Yanbin(Key Laboratory of Utility of Environmental Friendly Composite Materials and Biomass in Universities of Gansu Province,Gansu Provincial Biomass Functional Composite Materials Engineering Research Center,Key Laboratory of Environment-Friendly Composite Materials of the State Ethnic Affairs Commission,School of Chemical Engineering,Northwest Minzu University,Lanzhou 730030,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2023年第10期5736-5749,共14页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(21968032,22165025)
省科技计划项目(20YF8FA045)
中央高校基本科研业务费项目(31920220044)
化学学科创新团队建设项目(1110130139,1110130141)
省级一流专业建设(2019SJYLZY-08)
省级高校创新创业项目(2021SJCXCYXM-01,2021SJCXCYTD-01)
优秀研究生“创新之星”项目(2022CXZX-200)。
