Constructing Carbon Nanobubbles with Boron Doping as Advanced Anode for Realizing Unprecedently Ultrafast Potassium Ion Storage

扫码查看

原文链接

维普
万方数据

外文摘要：Carbonaceous material with favorable K+intercalation feature is considered as a compelling anode for potassium-ion batteries(PIBs).However,the inferior rate performance and cycling stability impede their large-scale application.Here,a facile template method is utilized to synthesize boron doping carbon nanobubbles(BCNBs).The incorporation of boron into the carbon structure introduces abundant defective sites and improves conductivity,facilitating both the intercalation-controlled and capacitive-controlled capacities.Moreover,theoretical calculation proves that boron doping can effectively improve the conductivity and facilitate electrochemical reversibility in PIBs.Correspondingly,the designed BCNBs anode delivers a high specific capacity(464 mAh g-1 at 0.05 A g-1)with an extraordinary rate performance(85.7 mAh g-1 at 50 A g-1),and retains a considerable capacity retention(95.2％relative to the 100th charge after 2000 cycles).Besides,the strategy of pre-forming stable artificial inorganic solid electrolyte interface effectively realizes high initial coulombic efficiency of 79.0％for BCNBs.Impressively,a dual-carbon potassium-ion capacitor coupling BCNBs anode displays a high energy density(177.8 Wh kg-1).This work not only shows great potential for utilizing heteroatom-doping strategy to boost the potassium ion storage but also paves the way for designing high-energy/power storage devices.

外文关键词：

high electrical conductivitypotassium ion batteriespotassium ion storagesuperior reversibility

作者：

Huanyu Liang、Zining Sun、Mingrui Zhang、Wei Hu、Jing Shi、Jingwei Chen、Weiqian Tian、Minghua Huang、Jingyi Wu、Huanlei Wang

展开 >

作者单位：

School of Materials Science and Engineering,Ocean University of China,Qingdao 266100,China

School of Chemistry and Chemical Engineering,Qilu University of Technology,Jinan 250353,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaShandong Provincial Natural Science Foundation,ChinaFundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities

项目编号：

2217912321471139ZR2020ME038202262010201941010

出版年：

2023

DOI：

10.1002/eem2.12559

能源与环境材料(英文)

CSCD

ISSN：

年,卷(期)：2023.6(4)

参考文献量80