Low-temperature synthesis of Fe_(2)(MoO_(4))_(3) nanosheets: A cathode for sodium ion batteries with kinetics enhancement  

作　　者：Ha Tran Huu N.S.M.Viswanath Ngoc Hung Vu Jong-Won Lee Won Bin Im 

机构地区：[1]Division of Materials Science and Engineering,Hanyang University,222,Wangsimni-ro,Seongdong-gu,Seoul,04763,Republic of Korea [2]School of Materials Science and Engineering,Chonnam National University,77 Yongbong-ro,Buk-gu,Gwangju,61186,Republic of Korea [3]Falcuty of Biotechnology,Chemistry and Environmental Engineering,Phenikaa University,Hanoi,10000,Vietnam [4]A&A Green Phoenix Group,Phenikaa Research and Technology Institute(PRATI),167 Hoang Ngan,Hanoi,10000,Vietnam [5]Department of Energy Science and Engineering,Daegu Gyeongbuk Institute of Science and Technology(DGIST),333 Techno Jungang-daero,Hyeonpung-eup,Dalseonggun,Daegu,42988,Republic of Korea

出　　处：《Nano Research》2021年第11期3977-3987,共11页纳米研究（英文版）

基　　金：This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Science, ICT and Future Planning (NRF-2017R1A2B3011967);This work was supported by the Engineering Research Center through National Research Foundation of Korea (NRF);funded by the Korean Government (MSIT) (NRF-2018R1A5A1025224).

摘　　要：Sodium ion batteries (SIBs) are alternatives to lithium ion batteries (LIBs), and offer some significant benefits such as cost reduction and a lower environmental impact;however, to compete with LIBs, further research is required to improve the performance of SIBs. In this study, an orthorhombic Na super ionic conductor structural Fe_(2)(MoO_(4))_(3) nanosheet with amorphous-crystalline core-shell alignment was synthesized using a facile low-temperature water-vapor-assisted solid-state reaction and applied as a cathode material for SIBs. The obtained material has a well-defined three-dimensional stacking structure, and exhibits a high specific capacity of 87.8 mAh·g^(−1) at a current density of 1 C = 91 mA·g^(−1) after 1,000 cycles, which is due to the considerable contribution of extra surface-related reaction such as the pseudo-capacitive process. This material shows significantly improved cycling and rated behavior as well as enhanced performance under high- and low-temperature conditions, as compared to the same materials prepared by the conventional high-temperature solid-state reaction. This enhancement is explained by the unique morphology in combination with the improved kinetics of the electrochemical reaction due to its lower charge transfer resistance and higher sodium ion conductivity.

关 键 词：low-temperature synthesis CATHODE sodium ion batteries KINETICS Na+super ionic conductor(NASICON) 

分 类 号：TM912[电气工程—电力电子与电力传动]