Boosting Li-ion storage kinetics via constructing layered TiO_(2) anode  

作　　者：Jiyue Hou Fei Wang Enfeng Zhang Ying Wang Peng Dong Yunxiao Wang Yiyong Zhang Xue Li Yingjie Zhang 

机构地区：[1]National and Local Joint Engineering Research Center of Lithium-ion Batteries and Materials Preparation Technology,Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming,650093,China [2]College of Electrical Information Engineering,Panzhihua University,Panzhihua,617000,China [3]University Wollongong,Australian Inst Innovat Mat,Inst Superconducting&Elect Mat,Innovat Campus Squires Way,Wollongong,NSW,2500,Australia

出　　处：《Particuology》2024年第10期22-29,共8页颗粒学报（英文版）

基　　金：supported by National Natural Science Foundation of China(grant No.202101AW070006);Yunnan Major Scientific and Technological Projects(grant No.202202AG050003);the Basic Research Plan(Key Project)of Yunnan Province(grant Nos.202101BE070001-018,202201AT070070);the National Youth Talent Support Program of Yunnan Province,China(grant No.YNQR-QNRC-2020-011).

摘　　要：Due to the typical intercalation-deintercalation mechanism,TiO_(2) holds great promise as a sustainable anode for next-generation lithium-ion batteries(LIBs).However,commercial TiO_(2)(C–TiO_(2))is granular and shows slow ionic conductivity,which greatly hinders its development due to sluggish kinetics,leading to low reversible capacity and inferior rate capability.In this study,a two-dimensional layered TiO_(2)(L-TiO_(2))anode is prepared via a one-step calcination process,which can effectively shorten the lithium ions diffusion path and improve its lithium ions conductivity.We elucidated the enhanced electrochemical performance of L-TiO_(2) as an anode in LIBs through pseudocapacitive acceleration of lithium ions intercalation and deintercalation using various characterization techniques,including different scan rate cyclic voltammetry tests,in situ electrochemical impedance spectroscopy,in situ Raman spectroscopy,and in situ X-ray diffraction.In comparison to C–TiO_(2) material,L-TiO_(2) material showcases remarkable electrochemical performance,achieving a capacity of 166 mAh/g after 100 cycles at 0.1 C.Additionally,the lithium-ion diffusion coefficient calculated for the L-TiO_(2) is two orders of magnitude greater,underscoring its potential as a negative electrode material for LIBs.

关 键 词：LITHIUM-IONBATTERIES ANODE MXene Layered TiO_(2) 

分 类 号：TM912[电气工程—电力电子与电力传动]