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Title:
AQUEOUS SODIUM-BASED MIXED ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2021/208299
Kind Code:
A1
Abstract:
The present invention provides an aqueous sodium-based mixed ion secondary battery. A positive electrode active material of the battery is sodium manganate Na xMnO 2 (X is equal to 0.2 to 1.0); a negative electrode active material of the battery is a metal oxide; an electrolyte is a sodium hydroxide solution dissolved with the saturated metal oxide; and a diaphragm is a composite diaphragm of non-woven fabric and hydrophilic PP; the positive electrode comprises a positive electrode active material (45 to 85 wt.%), a first conductive carbon material (10 to 45 wt.%) and a first binder material (5 to 10 wt.%); and the negative electrode comprises a negative electrode active material (73 to 92 wt.%), a second conductive carbon material (5 to 15 wt.%) and a second binder material (3 to 12 wt.%). The capacity retention ratio of the aqueous sodium-based mixed ion secondary battery is 92.6% after the aqueous sodium-based mixed ion secondary battery is cycled for 40 circles at the rate of 1C, and thus the aqueous sodium-based mixed ion secondary battery has good charge-discharge cycling stability.

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Inventors:
DING BO (CN)
YANG PENG (CN)
CAO YI (CN)
LI CHANGSHENG (CN)
LUO GANGGUO (CN)
CHE YONG (CN)
DAI XIANG (CN)
Application Number:
PCT/CN2020/107114
Publication Date:
October 21, 2021
Filing Date:
August 05, 2020
Export Citation:
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Assignee:
ENPOWER ENERGY TECH ANHUI CO LTD (CN)
ENPOWER ENERGY TECH NANTONG CO LTD (CN)
ENPOWER ENERGY TECH CO LTD (CN)
International Classes:
H01M4/36; H01M10/36
Foreign References:
CN111477853A2020-07-31
CN104769757A2015-07-08
CN105826520A2016-08-03
CN105489949A2016-04-13
CN103441260A2013-12-11
CN101087018A2007-12-12
JP2019091528A2019-06-13
Other References:
ZHANG LIMING , YANHUI ZHANG , ZHI SU , HUALING TIAN , LEI WANG: "Synthesis and Electrochemical Characterization of α-NaMnO2 as a Cathode Material for Hybrid Na/Li-Ion Batteries", INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE, vol. 14, no. 3, 7 February 2019 (2019-02-07), pages 2422 - 2429, XP055857423, ISSN: 1452-3981
Attorney, Agent or Firm:
NANJING JIUZHI INTELLECTUAL PROPERTY FIRM (GENERAL PARTNERSHIP) (CN)
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