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Title: Surface transformation by a “cocktail” solvent enables stable cathode materials for sodium ion batteries

Journal Article · · Journal of Materials Chemistry. A
DOI:https://doi.org/10.1039/c7ta08410b· OSTI ID:1425931
 [1];  [1];  [2];  [1]; ORCiD logo [2];  [3]; ORCiD logo [1]
  1. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
  2. Tianjin Univ., Tianjin (China). School of Materials Science and Engineering
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)

Coating the surfaces of active materials has become an effective and indispensable path towards the stable operation of practical rechargeable batteries. Improving the affordability of coating processes can bring enormous manufacturing advantages to battery applications. Here in this paper, we report a cheap, simple and efficient method to create conformal coating layers on the primary particles of sodium layered oxide materials for improving battery performance. Mimicking the cathode–electrolyte interfacial reaction in practical cells, we create conformal coating layers via the spontaneous reaction between the oxidative cathode surfaces and a cocktail of reductive organic solvents. The conformal coating layers consist of metal–organic compounds with reduced transition metal cations, i.e., artificial cathode–electrolyte interphases (CEIs). The cells containing these coated cathode materials deliver much improved cycle life while maintaining reasonably high reversible capacity and rate capability. Furthermore, the structural stability and water resistance are enhanced, which can practically help simplify the storage protocol of cathode powders prior to battery manufacturing. The surfaces of most oxide cathode materials (e.g., lithium cathodes and sodium cathodes) are highly oxidative, and thus we expect that the present method, with tailored experimental parameters, can be readily applied to most battery systems.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1425931
Journal Information:
Journal of Materials Chemistry. A, Vol. 6, Issue 6; ISSN 2050-7488
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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Cited By (4)

Electrolytes and Electrolyte/Electrode Interfaces in Sodium‐Ion Batteries: From Scientific Research to Practical Application journal March 2019
A High‐Power Na 3 V 2 (PO 4 ) 3 ‐Bi Sodium‐Ion Full Battery in a Wide Temperature Range journal February 2019
A heterobimetallic single-source precursor enabled layered oxide cathode for sodium-ion batteries journal January 2018
Water-Processable P2-Na 0.67 Ni 0.22 Cu 0.11 Mn 0.56 Ti 0.11 O 2 Cathode Material for Sodium Ion Batteries journal January 2019

Figures / Tables (5)