Linyue Li, Yang Wang, Binbin Dan, Shixuan Li, Zhoulu Wang, Di Wang, Xiang Liu
{"title":"锂-CO2 电池中气体浓度驱动的 LiOH 化学反应","authors":"Linyue Li, Yang Wang, Binbin Dan, Shixuan Li, Zhoulu Wang, Di Wang, Xiang Liu","doi":"10.1016/j.elecom.2024.107669","DOIUrl":null,"url":null,"abstract":"<div><p>In conventional Li-CO<sub>2</sub> batteries, Li<sub>2</sub>CO<sub>3</sub> is an intractable discharge product due to its wide bandgap. To this end, researchers have focused more attention on the decomposition of Li<sub>2</sub>CO<sub>3</sub> in order to reduce the high charge potential. However, even the kinetics of CO<sub>2</sub> evolution process can be accelerated, Li<sub>2</sub>CO<sub>3</sub> will still passivate the cathodes, which in turn affects the cycle life of Li-CO<sub>2</sub> batteries. Here, we designed a CO<sub>2</sub> partly-absent Li-CO<sub>2</sub> battery, the concentration of CO<sub>2</sub> involved during the discharge process is reduced, then the discharge potential of this battery can be moved to 2.1 V. Furthermore, the discharge product of this CO<sub>2</sub> partly-absent Li-CO<sub>2</sub> battery is proved to be LiOH instead of Li<sub>2</sub>CO<sub>3</sub>, it can be recharged at a low potential of 3.5 V benefit from the readily degradable product (LiOH). In this Li-CO<sub>2</sub> battery, the effect of gas concentration on discharge process is studied firstly, and totally different results are discussed, offering new insights into the material design and the development of reliable rechargeable Li-CO<sub>2</sub> batteries in the future.</p></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":null,"pages":null},"PeriodicalIF":4.7000,"publicationDate":"2024-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1388248124000122/pdfft?md5=27501bc6171fcb783c9503b0a6e60413&pid=1-s2.0-S1388248124000122-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Gas concentration-driven LiOH chemistry in Li-CO2 batteries\",\"authors\":\"Linyue Li, Yang Wang, Binbin Dan, Shixuan Li, Zhoulu Wang, Di Wang, Xiang Liu\",\"doi\":\"10.1016/j.elecom.2024.107669\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In conventional Li-CO<sub>2</sub> batteries, Li<sub>2</sub>CO<sub>3</sub> is an intractable discharge product due to its wide bandgap. To this end, researchers have focused more attention on the decomposition of Li<sub>2</sub>CO<sub>3</sub> in order to reduce the high charge potential. However, even the kinetics of CO<sub>2</sub> evolution process can be accelerated, Li<sub>2</sub>CO<sub>3</sub> will still passivate the cathodes, which in turn affects the cycle life of Li-CO<sub>2</sub> batteries. Here, we designed a CO<sub>2</sub> partly-absent Li-CO<sub>2</sub> battery, the concentration of CO<sub>2</sub> involved during the discharge process is reduced, then the discharge potential of this battery can be moved to 2.1 V. Furthermore, the discharge product of this CO<sub>2</sub> partly-absent Li-CO<sub>2</sub> battery is proved to be LiOH instead of Li<sub>2</sub>CO<sub>3</sub>, it can be recharged at a low potential of 3.5 V benefit from the readily degradable product (LiOH). In this Li-CO<sub>2</sub> battery, the effect of gas concentration on discharge process is studied firstly, and totally different results are discussed, offering new insights into the material design and the development of reliable rechargeable Li-CO<sub>2</sub> batteries in the future.</p></div>\",\"PeriodicalId\":304,\"journal\":{\"name\":\"Electrochemistry Communications\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.7000,\"publicationDate\":\"2024-01-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S1388248124000122/pdfft?md5=27501bc6171fcb783c9503b0a6e60413&pid=1-s2.0-S1388248124000122-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Electrochemistry Communications\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1388248124000122\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ELECTROCHEMISTRY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrochemistry Communications","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1388248124000122","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ELECTROCHEMISTRY","Score":null,"Total":0}
Gas concentration-driven LiOH chemistry in Li-CO2 batteries
In conventional Li-CO2 batteries, Li2CO3 is an intractable discharge product due to its wide bandgap. To this end, researchers have focused more attention on the decomposition of Li2CO3 in order to reduce the high charge potential. However, even the kinetics of CO2 evolution process can be accelerated, Li2CO3 will still passivate the cathodes, which in turn affects the cycle life of Li-CO2 batteries. Here, we designed a CO2 partly-absent Li-CO2 battery, the concentration of CO2 involved during the discharge process is reduced, then the discharge potential of this battery can be moved to 2.1 V. Furthermore, the discharge product of this CO2 partly-absent Li-CO2 battery is proved to be LiOH instead of Li2CO3, it can be recharged at a low potential of 3.5 V benefit from the readily degradable product (LiOH). In this Li-CO2 battery, the effect of gas concentration on discharge process is studied firstly, and totally different results are discussed, offering new insights into the material design and the development of reliable rechargeable Li-CO2 batteries in the future.
期刊介绍:
Electrochemistry Communications is an open access journal providing fast dissemination of short communications, full communications and mini reviews covering the whole field of electrochemistry which merit urgent publication. Short communications are limited to a maximum of 20,000 characters (including spaces) while full communications and mini reviews are limited to 25,000 characters (including spaces). Supplementary information is permitted for full communications and mini reviews but not for short communications. We aim to be the fastest journal in electrochemistry for these types of papers.