Fast-Charging Sodium-Ion Batteries Enabled by Molecular-Level Designed Nitrogen and Phosphorus Codoped Mesoporous Soft Carbon  

作　　者：Lei Liu Zhuzhu Du Jiaqi Wang Hongfang Du Sheng Wu Mengjun Li Yixuan Zhang Jinmeng Sun Zhipeng Sun Wei Ai 

机构地区：[1]Frontiers Science Center for Flexible Electronics(FSCFE)and Shaanxi Institute of Flexible Electronics(SIFE),Northwestern Polytechnical University(NPU),127 West Youyi Road,Xi'an 710072,China [2]Fujian Cross Strait Institute of Flexible Electronics(Future Technologies),Fujian Normal University,Fuzhou 350117,China [3]School of Materials and Energy,Guangdong University of Technology,Guangzhou,510006 Guangdong,China

出　　处：《Research》2024年第2期329-337,共9页研究（英文）

基　　金：supported by the National Natural Science Foundation of China(22279104,51902261,and 61935017);the National Key Research and Development Program of China(2020YFA0709900);the Guangdong Basic and Applied Basic Research Foundation(2020A1515110604);the Natural Science Basic Research Program of Shaanxi(2021JQ-107);the Natural Science Foundation of Ningbo(202003N4053 and 202003N4046);the Provincial Innovation and Entrepreneurship Training Program for College Students(S202110699517).

摘　　要：Soft carbons have attracted extensive interests as competitive anodes for fast-charging sodium-ion batteries(SIBs);however,the high-rate performance is still restricted by their large ion migration barriers and sluggish reaction kinetics.Herein,we show a molecular design approach toward the fabrication of nitrogen and phosphorus codoped mesoporous soft carbon(NPSC).The key to this strategy lies in the chemical cross-linking reaction between polyphosphoric acid and p-phenylenediamine,associated with pyrolysis induced in-situ self-activation that creates mesoporous structures and rich heteroatoms within the carbon matrix.Thanks to the enlarged interlayer spacing,reduced ion diffusion length,and plentiful active sites,the obtained NPSC delivers a superb rate capacity of 215 mAh g-1 at 10 A g-1 and an ultralong cycle life of 4,700 cycles at 5 A g^(-1).Remarkably,the full cell shows 99%capacity retention during 100 continuous cycles,and maximum energy and power densities of 191 Wh kg^(-1)and 9.2 kW kg^(-1),respectively.We believe that such a synthetic protocol could pave a novel venue to develop soft carbons with unique properties for advanced SIBs.

关 键 词：kinetics CARBONS LINKING 

分 类 号：O61[理学—无机化学]