Affinity Laminated Chromatography Membrane Built‐in Electrodes for Suppressing Polysulfide Shuttling in Lithium–Sulfur Batteries,Advanced Energy Materials

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Affinity Laminated Chromatography Membrane Built‐in Electrodes for Suppressing Polysulfide Shuttling in Lithium–Sulfur Batteries
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2019-11-19 , DOI: 10.1002/aenm.201903233
Yuxiao Wang ₁ , Ying Yu _{2,

3} , Yeqiang Tan ₁ , Tianyu Li ₂ , Yanbing Chen ₁ , Shuang Wang ₁ , Kunyan Sui ₁ , Hongzhang Zhang _{2,

4} , Yang Luo _{2,

3} , Xianfeng Li _{2,

4}

Affiliation

Lithium–sulfur (Li–S) batteries are promising candidates for energy storage, but suffer from capacity and cycling challenges caused by the serious shuttling effect of polysulfide (PS) ions. To address these issues, a sodium alginate (SA)‐derived affinity laminated chromatography membrane built‐in electrode is designed. This is the first attempt to utilize this type of membrane, which is widely used for the selective adsorption of proteins, in the battery field. An ordered multilayer structure throughout the electrode can easily be obtained, and the number of membrane layers can be also conveniently controlled by varying the cross‐linking time of SA. The PS shuttling effect is efficiently suppressed and the permeability of PSs is reduced by enveloping the carbon/sulfur powder in ultrathin laminated chromatography membranes. As a result, these designed electrodes deliver a superhigh initial capacity of 1492 mA h g⁻¹, with a capacity retention almost 20% higher than the contrast. This low‐cost and easily mass‐producible strategy inspired by affinity chromatography is expected to effectively solve the PS shuttling problem toward high‐loading and long‐lifetime Li–S batteries in practice.

中文翻译：

亲和层压色谱膜内置电极可抑制锂硫电池中的多硫化物穿梭

锂硫（Li–S）电池是有前途的能量存储候选者，但由于多硫化物（PS）离子的严重穿梭效应而引起的容量和循环挑战。为解决这些问题，设计了藻酸钠（SA）衍生的亲和层压色谱膜内置电极。这是在电池领域利用广泛用于蛋白质选择性吸附的这种膜的首次尝试。通过改变SA的交联时间，可以很容易地在整个电极上获得有序的多层结构，并且还可以方便地控制膜层的数量。通过将碳/硫粉包裹在超薄层压色谱膜中，可有效抑制PS的穿梭效应，并降低PS的渗透性。因此，^-1，容量保持率比对比值高近20％。这种受亲和色谱启发的低成本，易于批量生产的方法有望在实践中有效解决PS穿梭问题，以解决高负载和长寿命Li-S电池的问题。

更新日期：2020-01-14

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