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Flexible and High‐Loading Lithium–Sulfur Batteries Enabled by Integrated Three‐In‐One Fibrous Membranes
Author(s) -
Wang Jianan,
Yang Guorui,
Chen Jie,
Liu Yunpeng,
Wang Yuankun,
Lao ChengYen,
Xi Kai,
Yang Duowen,
Harris Christopher J.,
Yan Wei,
Ding Shujiang,
Kumar Ramachandran Vasant
Publication year - 2019
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201902001
Subject(s) - materials science , polysulfide , energy storage , separator (oil production) , cathode , membrane , sulfur , electrolyte , lithium–sulfur battery , chemical engineering , electrode , nanotechnology , electrical engineering , chemistry , thermodynamics , biochemistry , metallurgy , engineering , power (physics) , physics , quantum mechanics
Lithium–sulfur batteries are appealing as high‐energy storage systems and hold great application prospects in wearable and portable electronics. However, severe shuttle effects, low sulfur conductivity, and especially poor electrode mechanical flexibility restrict sulfur utilization and loading for practical applications. Herein, high‐flux, flexible, electrospun fibrous membranes are developed, which succeed in integrating three functional units (cathode, interlayer, and separator) into an efficient composite. This structure helps to eliminate negative interface effects, and effectively drives synergistic boosts to polysulfide confinement, electron transfer, and lithium‐ion diffusion. It delivers a high initial capacity of 1501 mA h g −1 and a discharge capacity of 933 mA h g −1 after 400 cycles, with slow capacity attenuation (0.069% per cycle). Even under high sulfur loading (13.2 mg cm −2 , electrolyte/sulfur ratio = 6 mL g −1 ) or in an alternative folded state, this three‐in‐one membrane still exhibits high areal capacity (11.4 mA h cm −2 ) and exceptional application performance (powering an array of over 30 light‐emitting diodes (LEDs)), highlighting its huge potential in high‐energy flexible devices.