<br>具有最小化 Br2 交叉的超低自放电水|有机无膜电池,Advanced Science

当前位置： X-MOL 学术 › Adv. Sci. › 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.)

具有最小化 Br2 交叉的超低自放电水|有机无膜电池
Advanced Science ( IF 14.3 ) Pub Date : 2024-01-03 , DOI: 10.1002/advs.202307780
Han Yang ₁ , Shiyu Lin ₁ , Yunpeng Qu ₂ , Guotao Wang ₁ , Shuangfei Xiang ₃ , Fuzhu Liu ₄ , Chao Wang ₅ , Hao Tang ₁ , Di Wang ₁ , Zhoulu Wang ₁ , Xiang Liu ₁ , Yi Zhang ₁ , Yutong Wu ₁

Affiliation

与固体电池相比，将活性材料溶解在液体中的电池具有安全性和尺寸优势，但固有的液体特性会导致在循环期间和空闲时电解质接触时材料交叉引起的自放电，因此效率高且成本低- 迫切需要有效的解决方案来最大限度地减少交叉。对使用添加到溴化锌(ZnBr ₂ )溶液中的二氯甲烷(CH ₂ Cl ₂ )和四丁基溴化铵(TBABr)作为电解质的超低自放电水性无膜电池进行说明。多溴化物被限制在有机相中，并且溴(Br ₂ )扩散引起的自放电被最小化。在 90% 荷电状态 (SOC) 下，无膜 ZnBr ₂ |TBABr (Z|T) 电池在 120 天后表现出开路电压 (OCV) 下降仅为 42 mV，比 ZnBr ₂电池长 152 倍，并且性能优越到 102 份来自所有类型液体活性材料电池的先前报告。 120天容量保持率为95.5%，高于商用锌镍（Zn-Ni）电池和全钒氧化还原液流电池（VRFB，电解液单独存放），接近锂离子（Li-ion）电池。 Z|T 可实现 >500 次循环（2670 小时、0.5 m电解液、无膜 ZnBr ₂电池的 250 倍），库仑效率 (CE) 约为 100%。 Z|T 简单且经济高效的设计为调节液体电池中的材料交叉以实现延长运行提供了概念灵感。

"点击查看英文标题和摘要"

An Ultra-Low Self-Discharge Aqueous|Organic Membraneless Battery with Minimized Br2 Cross-Over

Batteries dissolving active materials in liquids possess safety and size advantages compared to solid-based batteries, yet the intrinsic liquid properties lead to material cross-over induced self-discharge both during cycling and idle when the electrolytes are in contact, thus highly efficient and cost-effective solutions to minimize cross-over are in high demand. An ultra-low self-discharge aqueous|organic membraneless battery using dichloromethane (CH₂Cl₂) and tetrabutylammonium bromide (TBABr) added to a zinc bromide (ZnBr₂) solution as the electrolyte is demonstrated. The polybromide is confined in the organic phase, and bromine (Br₂) diffusion-induced self-discharge is minimized. At 90% state of charge (SOC), the membraneless ZnBr₂|TBABr (Z|T) battery shows an open circuit voltage (OCV) drop of only 42 mV after 120 days, 152 times longer than the ZnBr₂ battery, and superior to 102 previous reports from all types of liquid active material batteries. The 120-day capacity retention of 95.5% is higher than commercial zinc-nickel (Zn–Ni) batteries and vanadium redox flow batteries (VRFB, electrolytes stored separately) and close to lithium-ion (Li-ion) batteries. Z|T achieves >500 cycles (2670 h, 0.5 m electrolyte, 250 folds of membraneless ZnBr₂ battery) with ≈100% Coulombic efficiency (CE). The simple and cost-effective design of Z|T provides a conceptual inspiration to regulate material cross-over in liquid-based batteries to realize extended operation.

更新日期：2024-01-03

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南