Sulfurized Polyacrylonitrile Cathode Derived from Intermolecular Cross-Linked Polyacrylonitrile for a Rechargeable Lithium Battery,ACS Applied Energy Materials

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Sulfurized Polyacrylonitrile Cathode Derived from Intermolecular Cross-Linked Polyacrylonitrile for a Rechargeable Lithium Battery
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2021-05-20 , DOI: 10.1021/acsaem.1c00556
Jingyu Lei ₁ , Jiahang Chen ₁ , Ahmad Naveed ₁ , Huiming Zhang ₁ , Jun Yang ₁ , Yanna Nuli ₁ , Jiulin Wang _{1,

2}

Affiliation

Sulfurized pyrolyzed poly(acrylonitrile) (S@pPAN) has become one of the most promising cathodes for rechargeable batteries because of its high compressed density, low E/S ratio, no self-discharge, and stable cycling. However, it suffers from low sulfur content (<45 wt %), which limits the composite capacity and thereby the energy density. Herein, we prepared cross-linked PAN precursor with porous structure and high specific area via an intermolecular cross-linking method. The prepared cross-linked PAN offers more space to accommodate sulfur molecules, rendering the effective sulfur content up to 53.63 wt %. It realizes a remarkable reversible specific capacity of 829 mAh g^–1_composites at 0.2 C. As a result, it provides a way to prepare the S@pPAN cathodes for a lithium–sulfur battery with high energy density and good electrochemical performances.

中文翻译：

由分子间交联聚丙烯腈衍生的硫化聚丙烯腈阴极，用于可充电锂电池

硫化热解聚（丙烯腈）（S@pPAN）由于其压缩密度高、E/S比低、无自放电和循环稳定，已成为最有前途的可充电电池正极之一。然而，它的硫含量低（<45wt%），这限制了复合材料的容量，从而限制了能量密度。在此，我们通过分子间交联方法制备了具有多孔结构和高比表面积的交联 PAN 前驱体。制备的交联 PAN 提供了更多的空间来容纳硫分子，使有效硫含量高达 53.63 wt%。它在 0.2 C 下实现了 829 mAh g ^–1_复合材料的显着可逆比容量. 因此，它提供了一种制备具有高能量密度和良好电化学性能的锂硫电池的 S@pPAN 正极的方法。

更新日期：2021-06-28

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