skip to main content

DOE PAGESDOE PAGES

Title: Polysulfides capture-copper additive for long cycle life lithium sulfur batteries

Copper powder was introduced into the lithium sulfur battery system to capture intermediate polysulfides and Cu xS (x = 1 or 2) species was generated depending on the chain length of polysulfides. This phenomenon was verified by X-ray absorption near edge structure technique. The results indicated that copper can be oxidized to CuS by Li 2S x (x ≥ 6), and a mixture of Cu 2S and CuS was obtained when x ranges from 3 to 6. While Cu 2S is eventually formed in the presence of Li 2S 3. After several cycles activation, the polysulfide-shuttle effect and self-discharge phenomenon which hinder the application of lithium sulfur batteries are found nearly eliminated Further experiments demonstrated that in the case of Cu 2S generation, a high specific sulfur capacity of 1300 mAh g –1 could be delivered, corresponding to 77.6% sulfur utilization, while the Coulombic efficiency approximates around 100%. As a result, self-discharge experiment further demonstrated that polysulfides almost disappear in the electrolyte, which verified the polysulfide-capture capability of copper.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [1] ;  [1]
  1. Tsinghua Univ., Beijing (China)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 8; Journal Issue: 44; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Natural Science Foundation of China (NNSFC)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE; coulombic efficiency; in situ generation; lithium sulfur battery; polysulfides capture; shuttle effect free; sulfur utilization
OSTI Identifier:
1364637

Jia, Lei, Wu, Tianpin, Lu, Jun, Ma, Lu, Zhu, Wentao, and Qiu, Xinping. Polysulfides capture-copper additive for long cycle life lithium sulfur batteries. United States: N. p., Web. doi:10.1021/acsami.6b10366.
Jia, Lei, Wu, Tianpin, Lu, Jun, Ma, Lu, Zhu, Wentao, & Qiu, Xinping. Polysulfides capture-copper additive for long cycle life lithium sulfur batteries. United States. doi:10.1021/acsami.6b10366.
Jia, Lei, Wu, Tianpin, Lu, Jun, Ma, Lu, Zhu, Wentao, and Qiu, Xinping. 2016. "Polysulfides capture-copper additive for long cycle life lithium sulfur batteries". United States. doi:10.1021/acsami.6b10366. https://www.osti.gov/servlets/purl/1364637.
@article{osti_1364637,
title = {Polysulfides capture-copper additive for long cycle life lithium sulfur batteries},
author = {Jia, Lei and Wu, Tianpin and Lu, Jun and Ma, Lu and Zhu, Wentao and Qiu, Xinping},
abstractNote = {Copper powder was introduced into the lithium sulfur battery system to capture intermediate polysulfides and CuxS (x = 1 or 2) species was generated depending on the chain length of polysulfides. This phenomenon was verified by X-ray absorption near edge structure technique. The results indicated that copper can be oxidized to CuS by Li2Sx (x ≥ 6), and a mixture of Cu2S and CuS was obtained when x ranges from 3 to 6. While Cu2S is eventually formed in the presence of Li2S3. After several cycles activation, the polysulfide-shuttle effect and self-discharge phenomenon which hinder the application of lithium sulfur batteries are found nearly eliminated Further experiments demonstrated that in the case of Cu2S generation, a high specific sulfur capacity of 1300 mAh g–1 could be delivered, corresponding to 77.6% sulfur utilization, while the Coulombic efficiency approximates around 100%. As a result, self-discharge experiment further demonstrated that polysulfides almost disappear in the electrolyte, which verified the polysulfide-capture capability of copper.},
doi = {10.1021/acsami.6b10366},
journal = {ACS Applied Materials and Interfaces},
number = 44,
volume = 8,
place = {United States},
year = {2016},
month = {10}
}