A full battery system of pre-lithiated phosphorus/sulfurized pyrolyzed poly(acrylonitrile) with an effective electrolyte and improved safety,Green Chemistry

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A full battery system of pre-lithiated phosphorus/sulfurized pyrolyzed poly(acrylonitrile) with an effective electrolyte and improved safety
Green Chemistry ( IF 9.3 ) Pub Date : 2020-05-27 , DOI: 10.1039/d0gc01173h
Xinpeng Han _{1,

2,

3,

4,

5} , Xiaojun Wang _{6,

7,

8,

9} , Muyao Han _{1,

2,

3,

4,

5} , Jie Sun _{1,

2,

3,

4,

5}

Affiliation

Excessive stress has deteriorated the energy crisis and environmental problems; therefore, introducing a new rechargeable battery system for large-scale energy storage and electric vehicles (EVs) has become a major concern. Recently, phosphorus (P) anode as one of the promising candidates for fast-charging lithium-ion batteries (LIBs) has gained significant attention for safe EVs due to its low cost, high energy density and relatively high lithiation voltage (ca. 0.7 V vs. Li⁺/Li). However, its flammability, unavoidable side reactions with the electrolyte and large volumetric variation (∼300%) during cycling limit its large-scale employment. Herein, a localized high-concentration flame-retardant LiFSI-based electrolyte has been reported to simultaneously construct an elastic and robust LiF-rich solid electrolyte interface (SEI) both at the P anode and sulfur cathode. Thus, a new Li₃P-sulfur full battery system based on the pre-lithiated P anode and the sulfurized pyrolyzed poly(acrylonitrile) cathode was built, delivering a high capacity retention of 97.1% after 600 cycles at 1 A g⁻¹. This battery system avoids some fatal flaws of the Li–S battery, including Li dendrite formation and thermal instability. This work provides an alternative direction to obtain green and long-life batteries for commercial availability.

中文翻译：

带有有效电解液并提高安全性的预锂化/硫化热解聚丙烯腈的完整电池系统

过度的压力加剧了能源危机和环境问题；因此，为大型储能和电动汽车（EV）引入新的可再充电电池系统已成为主要问题。近期，磷（P）阳极作为快速充电锂离子电池（LIB）的有前途的候选之一，因其低成本，高能量密度和相对较高的锂化电压（约0.7 V ）而受到安全电动车的广泛关注。与李⁺/ Li）。但是，其易燃性，不可避免的与电解液的副反应以及循环过程中的大体积变化（约300％）限制了其大规模使用。在此，已经报道了一种局部的高浓度阻燃基于LiFSI的电解质，可以同时在P阳极和硫阴极上构造出一个弹性而坚固的富LiF固体电解质界面（SEI）。因此，构建了基于预锂化P阳极和硫化热解聚（丙烯腈）阴极的新型Li ₃ P硫全电池系统，在1 A g ^-1下进行600次循环后，其高容量保持率达到97.1％。这种电池系统避免了锂电池的致命缺陷，包括锂枝晶的形成和热不稳定性。这项工作为获取绿色长寿命电池以提供商业用途提供了另一个方向。

更新日期：2020-07-06

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