https://scholars.lib.ntu.edu.tw/handle/123456789/598250
標題: | Room-Temperature Synthesis of LiMn2O4by Electrochemical Ion Exchange in an Aqueous Medium | 作者: | Abdollahifar M Lannelongue P Liu H.-W Chen H Liao C.-H Sheu H.-S Lee J.-F Liao Y.-F Wu N.-L. NAE-LIH WU |
關鍵字: | aqueous Li-ion battery;cubic LiMn2O4;electrochemical ion-exchange synthesis;Mn3O4;pseudocapacitance;X-ray absorption analyses;Cathodes;Charging (batteries);Cyclic voltammetry;Electrochemical electrodes;Electrolytes;Ion exchange;Ions;Lithium-ion batteries;Manganese oxide;X ray absorption spectroscopy;Aqueous li-ion battery;Cubic limn2O4;Electrochemical ion exchange;Electrochemical ion-exchange synthesis;Ion exchange process;Pseudocapacitance;Room temperature synthesis;Spinel LiMn2O4;X-ray absorption analyze;X-ray absorptions;Lithium compounds | 公開日期: | 2021 | 卷: | 9 | 期: | 41 | 起(迄)頁: | 13717-13725 | 來源出版物: | ACS Sustainable Chemistry and Engineering | 摘要: | An exclusive room-temperature synthesis process is developed for producing cubic spinel LiMn2O4 (CLMO), a low-cost, environmentally friendly, and fast-charging cathode material for Li-ion batteries. CLMO is synthesized using an electrochemical ion-exchange (ECIE) process in an aqueous electrolyte, starting from Mn3O4 nanocrystallites that are obtained based on facile solution reduction chemistry. In the ECIE process, Mn2+ from the Mn3O4 tetrahedral site is exchanged by Li+ from the electrolyte by applying a cyclic voltammetry (CV) routine. The ECIE mechanism is clearly revealed by the combination of CV profile evolution and in situ/operando synchrotron X-ray diffraction and X-ray absorption spectroscopy analyses. The resulting CLMO electrode presents a typical battery behavior with promising high-rate characteristics, showing, for instance, 62% of the full capacity at a charging-discharging (C-D) rate of 8C in an aqueous electrolyte together with a capacity retention of 80% over 500 cycles with a C-D current density of 1 A g-1. The electrochemical ion-exchange process may offer the opportunity to prepare other high-performance electrode materials for Li-ion battery applications. ? 2021 American Chemical Society. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85117273285&doi=10.1021%2facssuschemeng.1c03747&partnerID=40&md5=49b94c24c60f7e5542bed2ddf5e5f5d9 https://scholars.lib.ntu.edu.tw/handle/123456789/598250 |
ISSN: | 21680485 | DOI: | 10.1021/acssuschemeng.1c03747 |
顯示於: | 化學工程學系 |
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