Biomass seaweed-derived n itrogen self-doped porous carb on anodes for sodium-ion batteries:Insights into the structure and electrochemical activity  

作　　者：Chenrayan Senthil Jae Woo Park Nitheesha Shaji Gyu Sang Sim Chang Woo Lee 

机构地区：[1]Department of Chemical Engineering(Integrated Engineering)&Center for the SMART Energy Platform,College of Engineering,Kyung Hee University,1732 Deogyeong-daero,Cihueng,Yongin,Gyeonggi 17104,South Korea

出　　处：《Journal of Energy Chemistry》2022年第1期286-295,I0008,共11页能源化学（英文版）

基　　金：supported by the Next Generation Engineering Researcher Program of National Research Foundation of Korea(NRF)funded by the Ministry of Science and ICT(2017H1D8A2031138).

摘　　要：Sustainable transformation and efficient utilization of biomasses and their derived materials are environ-mentally as well as economically compliant strategies.Biomass seaweed-derived nitrogen self-doped porous carbon with tailored surface area and pore structures are prepared through carb on izatio n and activation.The in fluence of carb on ization temperature on morphology,surface area,and heteroatom dopants are investigated to optimize sodium-ion storage capability.Seaweed-derived nitrogen selfdoped activated carbon(SAC)as anode materials for sodium-ion batteries exhibits remarkable reversible capacity of 303/192 mAh g^(-1) after 100/500 cycles at current densities of 100/200 mA g^(-1) respectively,and a good rate capability.The interconnected and porous conducting nature along with the heteroatom dopant role in creating defective sites and charge stabilization are favorable for ion storage and diffusion and electron transport,indicating the electrodes can offer improved electrochemical performances.In addition,post-mortem analysis of the cycled carbon electrodes through ex-situ tools demonstrates the sodium-ion storage mechanism.

关 键 词：BIOMASS Heteroatom self-doping Porous carbon Anode Sodium-ion batteries Post-mortem ex-situ analysis 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ127.11[化学工程—无机化工]