纳米纤维素碳气凝胶制备及其电催化性能研究  

Preparation and Performance Research of Cellulose Nanofibril-based Carbon Aerogel Electrocatalysts

作　　者：陈永康 彭新文[1] CHEN Yongkang;PENG Xinwen(State Key Lab of Pulp and Paper Engineering,South China University of Technology,Guangzhou,Guangdong Province,510640)

机构地区：[1]华南理工大学制浆造纸国家重点实验室,广东广州510640

出　　处：《中国造纸》2022年第6期13-20,共8页China Pulp & Paper

基　　金：国家自然科学基金(31971614);中国博士后基金(2019T120725、2019M652882和2019M662924)。

摘　　要：本研究以纤维素纳米纤丝(CNF)为碳骨架,氮含量高的类石墨相氮化碳(g-C_(3)N_(4))为氮源和造孔剂,成功制备了一种具有分级多孔结构的氮掺杂碳气凝胶(NCA)电催化剂。研究了NCA的物理化学结构与氧还原反应(ORR)活性之间的关系,以及其锌-空气电池性能。该NCA催化剂表现出较高的比表面积(381.77 m^(2)/g)、分级多孔结构,氮掺杂含量3.27%。ORR测试结果表明,NCA具有优异的ORR催化活性,半波电位可达0.83 V,接近商业铂碳(Pt/C)电催化剂。进一步将NCA作为阴极催化剂用于组装水系锌-空气电池,在电流密度为10 mA/cm^(2)下可以实现长达110 h的循环充放电,具有良好的电池使用性能。In this study,nitrogen doped carbon aerogel(NCA)electrocatalyst with hierarchical pore structure was successfully prepared by using cellulose nanofibril(CNF)as carbon framework and g-C_(3)N_(4) with high nitrogen compound as nitrogen source and pore-forming agent.The physicochemical structure,oxygen reduction reaction(ORR)activity of NCA were investigated,and properties of zinc-air battery based on NCA were also studied.NCA revealed hierarchical pore structure with high specific surface area of 381.77 m^(2)/g,and successful nitrogen doping with nitrogen doping content of 3.27%.NCA displayed excellent ORR performances with high half-wave potential of 0.83 V,which was close to that of commercial platinum-based electrocatalyst.The zinc-air battery in water phase using the NCA as a cathode material exhibited long-term stability for more than 110 h at a current density of 10 mA/cm^(2),showing a good battery serviceability.

关 键 词：纳米纤维素 碳气凝胶 氧还原反应 锌-空气电池 

分 类 号：TS721[轻工技术与工程—制浆造纸工程] TQ352[化学工程]