当前位置: X-MOL 学术J. Energy Chem. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Achieving long-cycling sodium-ion full cells in ether-based electrolyte with vinylene carbonate additive
Journal of Energy Chemistry ( IF 13.1 ) Pub Date : 2020-11-06 , DOI: 10.1016/j.jechem.2020.10.047
Juan Shi , Lina Ding , Yanhua Wan , Liwei Mi , Linjie Chen , Dan Yang , Yuxiong Hu , Weihua Chen

Application of sodium-ion batteries is suppressed due to the lack of appropriate electrolytes matching cathode and anode simultaneously. Ether-based electrolytes, preference of anode materials, cannot match with high-potential cathodes failing to apply in full cells. Herein, vinylene carbonate (VC) as an additive into NaCF3SO3-Diglyme (DGM) could make sodium-ion full cells applicable without pre-activation of cathode and anode. The assembled FeS@C || Na3V2(PO4)3@C full cell with this electrolyte exhibits long term cycling stability and high capacity retention. The deduced reason is additive VC, whose HOMO level value is close to that of DGM, not only change the solvent sheath structure of Na+, but also is synergistically oxidized with DGM to form integrity and consecutive cathode electrolyte interphase on Na3V2(PO4)3@C cathode, which could effectively improve the oxidative stability of electrolyte and prevent the electrolyte decomposition. This work displays a new way to optimize the sodium-ion full cells easily with bright practical application potential.



中文翻译:

使用碳酸亚乙烯酯添加剂在醚类电解质中实现长循环钠离子全电池

由于缺乏同时匹配正极和负极的适当电解质,因此抑制了钠离子电池的应用。以醚为基础的电解质,作为阳极材料的首选,无法与无法应用于完整电池的高电位阴极匹敌。在本文中,碳酸亚乙烯酯(VC)作为NaCF 3 SO 3-二甘醇二甲醚(DGM)的添加剂可以使钠离子充满电池适用,而无需预先激活阴极和阳极。组装的FeS @ C || Na 3 V 2(PO 43带有这种电解质的C满电池表现出长期的循环稳定性和高容量保持率。推测原因是添加剂VC的HOMO能级值接近DGM的HOMO值,不仅改变了Na +的溶剂鞘结构,而且与DGM协同氧化形成完整性,并在Na 3 V 2上连续形成阴极电解质相间( PO 43 @C阴极,可有效提高电解质的氧化稳定性,防止电解质分解。这项工作显示了一种新的方法,可以轻松地优化钠离子全细胞,具有广阔的实际应用潜力。

更新日期:2020-11-06
down
wechat
bug