Mn‐Substituted Tunnel‐Type Polyantimonic Acid Confined in a Multidimensional Integrated Architecture Enabling Superfast‐Charging Lithium‐Ion Battery Anodes
Abstract Given the inherent features of open tunnel‐like pyrochlore crystal frameworks and pentavalent antimony species, polyantimonic acid (PAA) is an appealing conversion/alloying‐type anode material with fast solid‐phase ionic diffusion and multielectron reactions for lithium‐ion batteries. Yet,...
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doaj-c2c3a2a900c0421aa8b0deaf64d77b132021-02-03T12:50:59ZengWileyAdvanced Science2198-38442021-02-0183n/an/a10.1002/advs.202002866Mn‐Substituted Tunnel‐Type Polyantimonic Acid Confined in a Multidimensional Integrated Architecture Enabling Superfast‐Charging Lithium‐Ion Battery AnodesBoya Wang0Yunhong Wei1Haoyu Fang2Xiaoling Qiu3Qiaobao Zhang4Hao Wu5Qian Wang6Yun Zhang7Xiaobo Ji8Department of Advanced Energy Materials College of Materials Science and Engineering Sichuan University Chengdu Sichuan 610064 P. R. ChinaDepartment of Advanced Energy Materials College of Materials Science and Engineering Sichuan University Chengdu Sichuan 610064 P. R. ChinaDepartment of Advanced Energy Materials College of Materials Science and Engineering Sichuan University Chengdu Sichuan 610064 P. R. ChinaDepartment of Advanced Energy Materials College of Materials Science and Engineering Sichuan University Chengdu Sichuan 610064 P. R. ChinaDepartment of Materials Science and Engineering College of Materials Xiamen University Xiamen Fujian 361005 P. R. ChinaDepartment of Advanced Energy Materials College of Materials Science and Engineering Sichuan University Chengdu Sichuan 610064 P. R. ChinaDepartment of Advanced Energy Materials College of Materials Science and Engineering Sichuan University Chengdu Sichuan 610064 P. R. ChinaDepartment of Advanced Energy Materials College of Materials Science and Engineering Sichuan University Chengdu Sichuan 610064 P. R. ChinaCollege of Chemistry and Chemical Engineering Central South University Changsha Hunan 410083 P. R. ChinaAbstract Given the inherent features of open tunnel‐like pyrochlore crystal frameworks and pentavalent antimony species, polyantimonic acid (PAA) is an appealing conversion/alloying‐type anode material with fast solid‐phase ionic diffusion and multielectron reactions for lithium‐ion batteries. Yet, enhancing the electronic conductivity and structural stability are two key issues in exploiting high‐rate and long‐life PAA‐based electrodes. Herein, these challenges are addressed by engineering a novel multidimensional integrated architecture, which consists of 0D Mn‐substituted PAA nanocrystals embedded in 1D tubular graphene scrolls that are co‐assembled with 2D N‐doped graphene sheets. The integrated advantages of each subunit synergistically establish a robust and conductive 3D electrode framework with omnidirectional electron/ion transport network. Computational simulations combined with experiments reveal that the partial‐substitution of H3O+ by Mn2+ into the tunnel sites of PAA can regulate its electronic structure to narrow the bandgap with increased intrinsic electronic conductivity and reduce the Li+ diffusion barrier. All above merits enable improved reaction kinetics, adaptive volume expansion, and relieved dissolution of active Mn2+/Sb5+ species in the electrode materials, thus exhibiting ultrahigh rate capacity (238 mAh g−1 at 30.0 A g−1), superfast‐charging capability (fully charged with 56% initial capacity for ≈17 s at 80.0 A g−1) and durable cycling performance (over 1000 cycles).https://doi.org/10.1002/advs.202002866element substitutionfast charging anodelithium‐ion batteriesmultidimensional architecturepolyantimonic acid |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Boya Wang Yunhong Wei Haoyu Fang Xiaoling Qiu Qiaobao Zhang Hao Wu Qian Wang Yun Zhang Xiaobo Ji |
spellingShingle |
Boya Wang Yunhong Wei Haoyu Fang Xiaoling Qiu Qiaobao Zhang Hao Wu Qian Wang Yun Zhang Xiaobo Ji Mn‐Substituted Tunnel‐Type Polyantimonic Acid Confined in a Multidimensional Integrated Architecture Enabling Superfast‐Charging Lithium‐Ion Battery Anodes Advanced Science element substitution fast charging anode lithium‐ion batteries multidimensional architecture polyantimonic acid |
author_facet |
Boya Wang Yunhong Wei Haoyu Fang Xiaoling Qiu Qiaobao Zhang Hao Wu Qian Wang Yun Zhang Xiaobo Ji |
author_sort |
Boya Wang |
title |
Mn‐Substituted Tunnel‐Type Polyantimonic Acid Confined in a Multidimensional Integrated Architecture Enabling Superfast‐Charging Lithium‐Ion Battery Anodes |
title_short |
Mn‐Substituted Tunnel‐Type Polyantimonic Acid Confined in a Multidimensional Integrated Architecture Enabling Superfast‐Charging Lithium‐Ion Battery Anodes |
title_full |
Mn‐Substituted Tunnel‐Type Polyantimonic Acid Confined in a Multidimensional Integrated Architecture Enabling Superfast‐Charging Lithium‐Ion Battery Anodes |
title_fullStr |
Mn‐Substituted Tunnel‐Type Polyantimonic Acid Confined in a Multidimensional Integrated Architecture Enabling Superfast‐Charging Lithium‐Ion Battery Anodes |
title_full_unstemmed |
Mn‐Substituted Tunnel‐Type Polyantimonic Acid Confined in a Multidimensional Integrated Architecture Enabling Superfast‐Charging Lithium‐Ion Battery Anodes |
title_sort |
mn‐substituted tunnel‐type polyantimonic acid confined in a multidimensional integrated architecture enabling superfast‐charging lithium‐ion battery anodes |
publisher |
Wiley |
series |
Advanced Science |
issn |
2198-3844 |
publishDate |
2021-02-01 |
description |
Abstract Given the inherent features of open tunnel‐like pyrochlore crystal frameworks and pentavalent antimony species, polyantimonic acid (PAA) is an appealing conversion/alloying‐type anode material with fast solid‐phase ionic diffusion and multielectron reactions for lithium‐ion batteries. Yet, enhancing the electronic conductivity and structural stability are two key issues in exploiting high‐rate and long‐life PAA‐based electrodes. Herein, these challenges are addressed by engineering a novel multidimensional integrated architecture, which consists of 0D Mn‐substituted PAA nanocrystals embedded in 1D tubular graphene scrolls that are co‐assembled with 2D N‐doped graphene sheets. The integrated advantages of each subunit synergistically establish a robust and conductive 3D electrode framework with omnidirectional electron/ion transport network. Computational simulations combined with experiments reveal that the partial‐substitution of H3O+ by Mn2+ into the tunnel sites of PAA can regulate its electronic structure to narrow the bandgap with increased intrinsic electronic conductivity and reduce the Li+ diffusion barrier. All above merits enable improved reaction kinetics, adaptive volume expansion, and relieved dissolution of active Mn2+/Sb5+ species in the electrode materials, thus exhibiting ultrahigh rate capacity (238 mAh g−1 at 30.0 A g−1), superfast‐charging capability (fully charged with 56% initial capacity for ≈17 s at 80.0 A g−1) and durable cycling performance (over 1000 cycles). |
topic |
element substitution fast charging anode lithium‐ion batteries multidimensional architecture polyantimonic acid |
url |
https://doi.org/10.1002/advs.202002866 |
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