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Electrolyte Additive Enabling Conditioning-Free Electrolytes for Magnesium Batteries

Title
Electrolyte Additive Enabling Conditioning-Free Electrolytes for Magnesium Batteries
Authors
Kang, Sung-JinKim, HyeonjiHwang, SunwookJo, MinsangJang, MinchulPark, ChanghunHong, Seung-TaeLee, Hochun
DGIST Authors
Hong, Seung-TaeLee, Hochun
Issue Date
2019-01
Citation
ACS Applied Materials and Interfaces, 11(1), 517-524
Type
Article
Article Type
Article
Author Keywords
additiveconditioning behaviorelectrolyteheptamethyldisilazanemagnesium batteryMg(TFSI)2MgCl2
Keywords
ElectrolytesSecondary batteriesAdditivesChlorine compoundsDepositionBeneficial effectsCoulombic efficiencyElectrolyte additivesFree electrolytesheptamethyldisilazaneMagnesium batteriesMgCl2Normal operationsMagnesium compounds
ISSN
1944-8244
Abstract
Most electrolytes for rechargeable Mg batteries require time-consuming conditioning or precycling process to achieve a fully reversible Mg deposition/dissolution, which hinders the normal operation of Mg batteries. This study details a simple and effective method for eliminating this conditioning behavior using heptamethyldisilazane (HpMS) as an electrolyte additive. It was found that the HpMS additive greatly increases the current density and Coulombic efficiency of Mg deposition/dissolution from the initial cycles in various sulfone and glyme solutions containing MgCl2 or Mg(TFSI)2. The beneficial effect of HpMS was ascribed to its ability to scavenge trace water in the electrolytes and remove Mg(OH)2 and Mg(TFSI)2-decomposition products from the Mg surface. Considering its applicability for a wide range of Mg electrolytes, the use of HpMS is expected to accelerate the development of practical Mg batteries. © 2018 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/9528
DOI
10.1021/acsami.8b13588
Publisher
American Chemical Society
Related Researcher
  • Author Lee, Hochun Electrochemistry Laboratory for Sustainable Energy(ELSE)
  • Research Interests Lithium-ion batteries; Novel Materials for rechargeable batteries; Novel energy conversion;storage systems; Electrochemistry; 리튬이차전지; 이차전지용 신규 전극 및 전해액; 신규 에너지변환 및 저장 시스템; 전기화학
Files:
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Collection:
Department of Energy Science and EngineeringDiscovery Lab(Batteries & Materials Discovery Laboratory)1. Journal Articles
Department of Energy Science and EngineeringElectrochemistry Laboratory for Sustainable Energy(ELSE)1. Journal Articles


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