A Functional Prelithiation Separator Promises Sustainable High-Energy Lithium-Ion Batteries,Advanced Energy Materials

当前位置： X-MOL 学术 › Adv. Energy Mater. › 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.)

A Functional Prelithiation Separator Promises Sustainable High-Energy Lithium-Ion Batteries
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2023-03-29 , DOI: 10.1002/aenm.202300507
Qinghai Meng ₁ , Min Fan ₁ , Xin Chang _{1,

2} , Hongliang Li ₃ , Wen‐Peng Wang ₁ , Yu‐Hui Zhu _{1,

2} , Jing Wan ₁ , Yao Zhao ₄ , Fuyi Wang ₄ , Rui Wen ₁ , Sen Xin _{1,

2} , Yu‐Guo Guo _{1,

2}

Affiliation

High-energy lithium-ion batteries built with silicon-based anode materials are usually associated with short cycle lives due to mechanical failure at an anode level and more importantly, due to electrochemical failure at a cell level as a result of irreversible consumption of cathode Li during initial charge. (Electro)chemical prelithiation has shown promises to compensate initial Li loss and improve cycling performance of the battery. However, previous strategies applied directly at anode or cathode could raise concerns on safety and degraded electrode structure, and are less compatible with industrial manufacture of batteries. Here, a new concept of prelithiation by lithiation agents supported functional separator, which is highly adaptive to electrode preparation, battery manufacture and formation, and is capable of, by simply adjusting cell voltage, not only replenishing cathode Li loss but re-uptaking anode Li to inhibit local over-lithiation and dendrite formation, is shown. By employing the functional separator, a 3-Ah Li-ion pouch cell that pairs a silicon-based anode and a high-nickel layered oxide cathode demonstrates stable energy output of >330 Wh kg⁻¹ and much improved cycling performance.

中文翻译：

功能性预锂化分离器有望实现可持续的高能锂离子电池

使用硅基负极材料构建的高能锂离子电池通常与较短的循环寿命相关，这是由于负极水平的机械故障，更重要的是，由于正极 Li 的不可逆消耗导致电池水平的电化学故障在初始充电。（电）化学预锂化已显示出有望补偿初始 Li 损失并改善电池的循环性能。然而，以前直接应用于阳极或阴极的策略可能会引起对安全性和电极结构退化的担忧，并且与电池的工业制造不太兼容。在这里，锂化剂预锂化的新概念支持功能隔膜，它高度适应电极制备、电池制造和化成，并且能够，通过简单地调节电池电压，不仅可以补充正极锂的损失，还可以重新吸收负极锂以抑制局部过度锂化和枝晶形成。通过使用功能性隔膜，将硅基阳极和高镍层状氧化物阴极配对的 3-Ah 锂离子软包电池表现出 >330 Wh kg 的稳定能量输出^-1和大大改善的循环性能。

更新日期：2023-03-29

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11