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

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

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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.

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

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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

Fujian Cross Strait Institute of Flexible Electronics(Future Technologies),Fujian Normal University,Fuzhou 350117,China

School of Materials and Energy,Guangdong University of Technology,Guangzhou,510006 Guangdong,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Key Research and Development Program of ChinaGuangdong Basic and Applied Basic Research FoundationNatural Science Basic Research Program of ShaanxiNatural Science Foundation of NingboNatural Science Foundation of NingboProvincial Innovation and Entrepreneurship Training Program for College Students

2227910451902261619350172020YFA07099002020A15151106042021JQ-107202003N4053202003N4046S202110699517

2024

10.34133/research.0209

研究(英文)

研究(英文)

CSTPCD
ISSN：
年,卷(期)：2024.2024(2)
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