Biomass-derived hard carbon microtubes with tunable apertures for high-performance sodium-ion batteries  

作　　者：Pin Song Shiqiang Wei Jun Di Jun Du Wenjie Xu Daobin Liu Changda Wang Sicong Qiao Yuyang Cao Qilong Cui Pengjun Zhang Liaobo Ma Jiewu Cui Yan Wang Yujie Xiong 

机构地区：[1]Key Laboratory of Functional Molecular Solids,Ministry of Education,Anhui Engineering Research Center of Carbon Neutrality,Anhui Laboratory of Molecule-Based Materials,College of Chemistry and Materials Science,Anhui Normal University,Wuhu 241000,China [2]Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),College of Chemistry,Nankai University,Tianjin 300071,China [3]Key Laboratory of Advanced Functional Materials and Devices of Anhui Province,Hefei University of Technology,Hefei 230009,China [4]National Synchrotron Radiation Laboratory,Chinese Academy of Sciences(CAS)Center for Excellence in Nanoscience,School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230029,China [5]School of Chemistry and Chemical Engineering,National Special Superfine Powder Engineering Research Center,Nanjing University of Science and Technology,Nanjing 210094,China [6]School of Materials Science and Engineering,Anhui University of Technology,Maanshan 243002,China

出　　处：《Nano Research》2023年第4期4874-4879,共6页纳米研究（英文版）

基　　金：supported by the Natural Science Research Project for Universities in Anhui Province(No.KJ2021ZD0006);the Natural Science Foundation of Anhui Province(No.2208085MB21);the Fundamental Research Funds for the Central Universities of China(No.PA2022GDSK0056);the University Synergy Innovation Program of Anhui Province(Nos.GXXT-2020-073 and GXXT-2020-074),the National Key R&D Program of China(No.2020YFA0406103);the National Natural Science Foundation of China(Nos.21725102,91961106,91963108,and 22175165);Singapore National Research Foundation under NRF RF Award No.Tier 12017-T1-001-075.

摘　　要：Sodium-ion batteries(SIBs)are considered the most up-and-coming complements for large-scale energy storage devices due to the abundance and cheap sodium.However,due to the bigger radius,it is still a great challenge to develop anode materials with suitable space for the intercalation of sodium ions.Herein,we present hard carbon microtubes(HCTs)with tunable apertures derived from low-cost natural kapok fibers via a carbonization process for SIBs.The resulted HCTs feature with smaller surface area and shorter Na+diffusion path benefitting from their unique micro-nano structure.Most importantly,the wall thickness of HCTs could be regulated and controlled by the carbonization temperature.At a high temperature of 1,600℃,the carbonized HCTs possess the smallest wall thickness,which reduces the diffusion barrier of Na+and enhances the reversibility Na+storage.As a result,the 1600HCTs deliver a high initial Coulombic efficiency of 90%,good cycling stability(89.4%of capacity retention over 100 cycles at 100 mA·g^(−1)),and excellent rate capacity.This work not only charts a new path for preparing hard carbon materials with adequate ion channels and novel tubular micro-nano structures but also unravels the mechanism of hard carbon materials for sodium storage.

关 键 词：hard carbon kapok fibers sodium-ion batteries(SIBs) reversible capacity long cycle life 

分 类 号：TM912[电气工程—电力电子与电力传动]