无机材料学报2024，Vol.39Issue(9)：1005-1012,8.DOI:10.15541/jim20240063
基于低含水量普鲁士蓝正极的准固态钠离子电池
Development of Quasi-solid-state Na-ion Battery Based on Water-minimal Prussian Blue Cathode
摘要
Abstract
In comparison to Li-ion batteries,Na-ion batteries offer the benefits of low cost,good low-temperature performance,and safety,attracting great attention in the cost-and reliability-sensitive applications.With high capacity and low cost,Prussian blue-like materials(PBAs)stand as promising cathode materials for Na-ion batteries.However,the presence of crystalline water within their structure induces fast performance decay of the battery,serving as a critical bottleneck limiting their application.This work reports a facile thermal treatment strategy to effectively remove crystalline water from PBAs cathode materials,improving capacity retention from 73％to 88％after 340 cycles.The in-situ analysis uncovers that the initial loss of Coulombic efficiency of PBAs cathode is a result of its irreversible transformation from a trigonal form to cubic phase during the charging and discharging process.This issue can be addressed by introducing of Na2C2O4 to compensate the irreversible Na loss in the cathode.On this basis,a high-performance quasi-solid-state Na-ion battery is built by pairing a low-water-content PBAs cathode with Na2C2O4 additive and a hard carbon(HC)anode within a poly(ethylene glycol)diacrylate(PEGDA)-based quasi-solid-state electrolyte with high ionic conductivity and electrochemical stability.This battery exhibits the specific capacities ranging from 58 to 105 mAh·g at current densities from 20 to 500 mA·g,capable of sustaining stable cycling for over 200 cycles.This study underscores the significant improvement in stability and capacity of PBAs cathode materials by the efficient removal of crystalline water in them.关键词
钠离子电池/准固态电池/普鲁士蓝正极/原位分析Key words
Na-ion battery/quasi-solid-state battery/Prussian blue cathode/in-situ analysis分类
化学化工引用本文复制引用
王琨鹏,刘兆林,林存生,王治宇..基于低含水量普鲁士蓝正极的准固态钠离子电池[J].无机材料学报,2024,39(9):1005-1012,8.基金项目
国家重点研发计划(2022YFB4101600,2022YFB4101605) （2022YFB4101600,2022YFB4101605）
国家自然科学基金(52372175) （52372175）
大连市科技创新基金(2023JJ12GX020) （2023JJ12GX020）
中央高校基本科研业务费(DUT22LAB125)National Key R&D Program of China(2022YFB4101600,2022YFB4101605) （DUT22LAB125）
National Natural Science Foundation of China(52372175) （52372175）
Innovation and Technology Fund of Dalian(2023JJ12GX020) （2023JJ12GX020）
Fundamental Research Funds for the Central Universities(DUT22LAB125) （DUT22LAB125）
