Constructing long-cycling crystalline C_(3)N_(4)-based carbonaceous anodes for sodium-ion battery via N configuration control  

作　　者：Ying Wang Hongguan Li Shuanlong Di Boyin Zhai Ping Niu Antonios Kelarakis Shulan Wang Li Li 

机构地区：[1]School of Metallurgy,Northeastern University,Shenyang,Liaoning,China [2]State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang,Liaoning,China [3]Department of Chemistry,College of Science,Northeastern University,Shenyang,Liaoning,China [4]School of Natural Sciences,UCLan Research Centre for Smart Materials,University of Central Lancashire,Preston,UK [5]Foshan Graduate School of Innovation,Northeastern University,Foshan,Guangdong,China

出　　处：《Carbon Energy》2024年第1期159-171,共13页碳能源（英文）

基　　金：supported by the National Natural Science Foundation of China(51904059);Applied Basic Research Program of Liaoning(2022JH2/101300200);Guangdong Basic and Applied Basic Research Foundation(2022A1515140188);Fundamental Research Funds for the Central Universities(N_(2)002005,N_(2)125004,N_(2)225044)。

摘　　要：Carbon nitrides with two-dimensional layered structures and high theoretical capacities are attractive as anode materials for sodium-ion batteries while their low crystallinity and insufficient structural stability strongly restrict their practical applications.Coupling carbon nitrides with conductive carbon may relieve these issues.However,little is known about the influence of nitrogen(N)configurations on the interactions between carbon and C_(3)N_(4),which is fundamentally critical for guiding the precise design of advanced C_(3)N_(4)-related electrodes.Herein,highly crystalline C_(3)N_(4)(poly(triazine imide),PTI)based all-carbon composites were developed by molten salt strategy.More importantly,the vital role of pyrrolic-N for enhancing charge transfer and boosting Na+storage of C_(3)N_(4)-based composites,which was confirmed by both theoretical and experimental evidence,was spot-highlighted for the first time.By elaborately controlling the salt composition,the composite with high pyrrolic-N and minimized graphitic-N content was obtained.Profiting from the formation of highly crystalline PTI and electrochemically favorable pyrrolic-N configurations,the composite delivered an unusual reverse growth and record-level cycling stability even after 5000 cycles along with high reversible capacity and outstanding full-cell capacity retention.This work broadens the energy storage applications of C_(3)N_(4) and provides new prospects for the design of advanced all-carbon electrodes.

关 键 词：ANODE highly crystalline C_(3)N_(4) N configuration sodium-ion batteries ultra-long cyclic stability 

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]