Cathode nanoarchitectonics with Na_(3)VFe_(0.5)Ti_(0.5)(PO_(4))_(3): Overcoming the energy barriers of multielectron reactions for sodium-ion batteries  

作　　者：Vaiyapuri Soundharrajan Sungjin Kim Subramanian Nithiananth Muhammad H.Alfaruqi JunJi Piao Duong Tung Pham Vinod Mathew Sang A.Han Jung Ho Kim Jaekook Kim 

机构地区：[1]Department of Materials Science and Engineering,Chonnam National University,Bukgu,Gwangju,Republic of Korea [2]Graduate School of Science and Technology,Shizuoka University,Hamamatsu,Shizuoka,Japan [3]Departemen Teknik Metalurgi,Universitas Teknologi Sumbawa,Sumbawa,Indonesia [4]School of Engineering Physics,Hanoi University of Science and Technology,Hanoi,Vietnam [5]Institute for Superconducting and Electronic Materials(ISEM),Australian Institute of Innovative Materials(AIIM),University of Wollongong,North Wollongong,New South Wales,Australia [6]Research Center for Artificial Intelligence Assisted Ionics Based Materials Development Platform,Chonnam National University,Gwangju,Republic of Korea

出　　处：《Carbon Energy》2024年第9期1-14,共14页碳能源（英文）

基　　金：This work was supported by the National Research Foundation of Korea(NRF)Grant funded by the Korean government(MSIT)(NRF-2018R1A5A1025224 and NRF-2021R1A4A1052051);This work was also supported by the National Research Foundation of Korea Grant funded by the Korean Government Ministry of Education and Science Technology(NRF-2021R1I1A3060193).

摘　　要：High electrochemical stability and safety make Na+superionic conductor(NASICON)-class cathodes highly desirable for Na-ion batteries(SIBs).However,their practical capacity is limited,leading to low specific energy.Furthermore,the low electrical conductivity combined with a decline in capacity upon prolonged cycling(>1000 cycles)related to the loss of active material-carbon conducting contact regions contributes to moderate rate performance and cycling stability.The need for high specific energy cathodes that meet practical electrochemical requirements has prompted a search for new materials.Herein,we introduce a new carbon-coated Na_(3)VFe_(0.5)Ti_(0.5)(PO_(4))_(3)(NVFTP/C)material as a promising candidate in the NASICON family of cathodes for SIBs.With a high specific energy of∼457 Wh kg^(-1) and a high Na+insertion voltage of 3.0 V versus Na^(+)/Na,this cathode can undergo a reversible single-phase solid-solution and two-phase(de)sodiation evolution at 28 C(1 C=174.7 mAh g^(-1))for up to 10,000 cycles.This study highlights the potential of utilizing low-cost and highly efficient cathodes made from Earth-abundant and harmless materials(Fe and Ti)with enriched Na^(+)-storage properties in practical SIBs.

关 键 词：Fe and Ti swapping Na_(3)VFe_(0.5)Ti_(0.5)(PO_(4))_(3) prolonged cycle life structural stabilit 

分 类 号：TM912[电气工程—电力电子与电力传动]