Agar-derived nitrogen-doped porous carbon as anode for construction of cost-effective lithium-ion batteries  

作　　者：Tong Wang Jingquan Sha Wenwen Wang Yuhan Ji Zhi-Ming Zhang 

机构地区：[1]Institute for New Energy Materials&Low Carbon Technologies,School of Chemistry and Chemical Engineering,Tianjin University of Technology,Tianjin 300384,China [2]School of Chemistry,Chemical Engineering and Materials,Jining University,Qufu 273100,China

出　　处：《Chinese Chemical Letters》2023年第8期370-375,共6页中国化学快报（英文版）

基　　金：Financial support from the Natural Science Foundation of Shandong Province(No.ZR2021MB025).

摘　　要：Balancing cost and performance of porous carbon(PC)as anode for lithium-ion battery(LIBs)is the key to effectively promote commercial application.Herein,low-cost N-doped PC(NPC-Ts,T=600,750 and 900°C)were facilely prepared in batches via one-pot pyrolysis of agar with different carbonization temperature.The NPC-750 with specific surface area of 2914 m^(2)/g and N content of 2.84%exhibits an ultrahigh reversible capacity of 1019 mAh/g at 0.1 A/g after 100 cycles and 837 mAh/g at 1 A/g after 500 cycles.Remarkably,the resulting LIBs exhibit an ultrafast charge-discharge feature with a remarkable capacity of 281 mAh/g at 10 A/g and a superlong cycle life with a capacity retention of 87%after 5000 cycles at 10 A/g.Coupling with LiFePO_(4)cathode,the fabricated lithium-ion full cells possess high capacity,excellent rate and cycling performances(125 mAh/g at 100 mA/g,capacity retention of 95%,after 220 cycles),highlighting the practicability of this NPC-750 as the anode materials.

关 键 词：AGAR Porous carbon N-DOPING ANODE Lithium-ion battery 

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]