Premium
Porous Carbon Polyhedrons with High‐Level Nitrogen‐Doping for High‐Performance Sodium‐Ion Battery Anodes
Author(s) -
Gu Xin,
Dai Pengcheng,
Li Liangjun,
Li Junqian,
Li Dawei,
Zhang Hongyu,
Zhao Xuebo
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201601758
Subject(s) - electrochemistry , materials science , anode , nitrogen , sodium , chemical engineering , annealing (glass) , doping , porosity , lithium (medication) , energy storage , carbon fibers , ion , chemistry , electrode , composite number , composite material , organic chemistry , medicine , power (physics) , physics , optoelectronics , quantum mechanics , engineering , metallurgy , endocrinology
Sodium‐ion batteries have been regarded as probable alternatives to lithium‐ion batteries in the field of large‐scale energy storage. In this work, nitrogen‐doped porous carbon (NPC) polyhedrons are fabricated by using nitrogen‐containing metal‐organic frameworks as novel templates and precursors. The resultant NPC materials exhibit unique structure features, including porous structure, high‐level nitrogen‐doping and large surface areas. Among the NPC materials obtained at different annealing temperatures, NPC‐600 exhibits the best sodium storage properties for sodium‐ion batteries. The correlations between electrochemical properties and structure/composition of the NPC materials are disclosed. The best NPC‐600 delivers a high reversible capacity of 231 mA h g −1 at 0.05 A g −1 , superior rate capability with a stable capacity of 145 mA h g −1 at 1 A g −1 , and good long‐term cycling stability with a stable capacity of 182 mA h g −1 after cycling at 0.5 A g −1 for 500 cycles. The excellent sodium storage performances can be ascribed to the porous structure with enhanced reaction kinetics and high‐level nitrogen‐doping with high electrochemical reactivity.