Rechargeable Na-MnO_(2) battery with modified cell chemistry  

作　　者：Sirugaloor Thangavel Senthilkumar Rebeca Marcilla Youngsik Kim Jesus Palma Mani Ulaganathan Jeong-Sun Park 

机构地区：[1]School of Energy&Chemical Engineering,Ulsan National Institute of Science and Technology(UNIST),Ulsan 689-798,Republic of Korea [2]Electrochemical Processes Unit,IMDEA Energy Institute,Avda.Ramón de La Sagra 3,28935,Móstoles,Spain [3]Center for Advanced Materials Research,Research Institute of Science and Technology,University of Sharjah,P.O.Box 27272,Sharjah,United Arab Emirates [4]Energy Materials and Devices Lab,4TOONE Corporation,UNIST-gil 50,Ulsan 689-798,Republic of Korea [5]Department of Sciences,Amrita School of Physical Sciences,Amrita Vishwa Vidyapeetham,Coimbatore 641112,India

出　　处：《Journal of Energy Chemistry》2023年第9期414-423,共10页能源化学（英文版）

基　　金：supported by the Korea Research Fellowship Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (2016H1D3A1909680);supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (20215610100040), Development of 20Wh seawater secondary battery unit cell;minsisterio de Economia y competitividal (Spain) for the financially supporting this study through Juan de la Cierva-Incorporación program (IJC2018-038426-I)。

摘　　要：High voltage,high energy density,nominal cycle life,and low cost are the most critical requirements of rechargeable batteries for their widespread energy storage applications in electric vehicles and renewable energy technologies.Na-MnO_(2) battery could be a low-cost contender,but it suffers extensively from its low cell voltage and poor rechargeability.In this study,we modified the conventional cell structure of Na-MnO_(2) battery and established altered cell chemistry through a hybrid electrochemical process consisting of Na striping/plating at the anode and Zn^(2+) insertion/de-insertion along with MnO_(2) dissolution/deposition at the cathode.After the modification,Na-MnO_(2) battery exhibits a discharge capacity of 267.10 mA h/g and a cell voltage of 3.30 V(vs.Na/Na^(+)),resulting in a high specific energy density of 881.43 Wh/kg.After 300 cycles,the battery retains 98% of its first-cycle discharge capacity with100% coulombic efficiency.Besides,Na metal-free battery assembled using sodium biphenyl as a safer anode also delivers an excellent energy density of 810.0 Wh/kg.This work could provide a feasible method to develop an advanced Na-MnO_(2) battery for real-time energy storage applications.

关 键 词：Hybrid battery Sodium metal Sodium biphenyl High cell voltage Manganese dioxide battery Modified cell chemistry 

分 类 号：TM912[电气工程—电力电子与电力传动]