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Lightweight Reduced Graphene [email protected]2 Interlayer as Polysulfide Barrier for High-Performance Lithium–Sulfur Batteries
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-01-16 00:00:00 , DOI: 10.1021/acsami.7b18645 Lei Tan 1 , Xinhai Li 1 , Zhixing Wang 1 , Huajun Guo 1 , Jiexi Wang 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-01-16 00:00:00 , DOI: 10.1021/acsami.7b18645 Lei Tan 1 , Xinhai Li 1 , Zhixing Wang 1 , Huajun Guo 1 , Jiexi Wang 1
Affiliation
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The further development of lithium–sulfur (Li–S) batteries is limited by the fact that the soluble polysulfide leads to the shuttle effect, thereby reducing the cycle stability and cycle life of the batteries. To address this issue, here a thin and lightweight (8 μm and 0.24 mg cm–2) reduced graphene [email protected]2 ([email protected]2) interlayer between the cathode and the commercial separator is developed as a polysulfide barrier. The rGO plays the roles of both a polysulfide physical barrier and an additional current collector, while MoS2 has a high chemical adsorption for polysulfides. The experiments demonstrate that the Li–S cell constructed with an [email protected]2-coated separator shows a high reversible capacity of 1122 mAh g–1 at 0.2 C, a low capacity fading rate of 0.116% for 500 cycles at 1 C, and an outstanding rate performance (615 mAh g–1 at 2 C). Such an interlayer is expected to be ideal for lithium–sulfur battery applications because of its excellent electrochemical performance and simple synthesis process.
中文翻译：
轻量化的石墨烯[电子邮件保护] 2中间层，作为高性能锂硫电池的多硫化物屏障
锂硫（Li–S）电池的进一步发展受到以下事实的限制：可溶性多硫化物会导致穿梭效应，从而降低了电池的循环稳定性和循环寿命。为了解决这个问题，这里开发了阴极和商用隔板之间的薄而轻的（8μm和0.24 mg cm –2）还原石墨烯[电子邮件保护] 2（[电子邮件保护] 2）中间层作为多硫化物阻挡层。rGO既扮演着多硫化物物理屏障的角色，又扮演着额外的集电器的角色，而MoS 2对多硫化物的化学吸附却很高。实验表明，Li-S电池由[电子邮件保护] 2构成涂覆的隔膜在0.2 C时显示出1122 mAh g –1的高可逆容量，在1 C时进行500次循环显示低的容量衰减率0.116％，并具有出色的速率性能（在2 C时为615 mAh g –1）。由于这种中间层具有出色的电化学性能和简单的合成工艺，因此有望成为锂硫电池应用的理想选择。
更新日期：2018-01-16
中文翻译：
轻量化的石墨烯[电子邮件保护] 2中间层，作为高性能锂硫电池的多硫化物屏障
锂硫（Li–S）电池的进一步发展受到以下事实的限制：可溶性多硫化物会导致穿梭效应，从而降低了电池的循环稳定性和循环寿命。为了解决这个问题，这里开发了阴极和商用隔板之间的薄而轻的（8μm和0.24 mg cm –2）还原石墨烯[电子邮件保护] 2（[电子邮件保护] 2）中间层作为多硫化物阻挡层。rGO既扮演着多硫化物物理屏障的角色，又扮演着额外的集电器的角色，而MoS 2对多硫化物的化学吸附却很高。实验表明，Li-S电池由[电子邮件保护] 2构成涂覆的隔膜在0.2 C时显示出1122 mAh g –1的高可逆容量，在1 C时进行500次循环显示低的容量衰减率0.116％，并具有出色的速率性能（在2 C时为615 mAh g –1）。由于这种中间层具有出色的电化学性能和简单的合成工艺，因此有望成为锂硫电池应用的理想选择。
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