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“Ni‐Less” Cathodes for High Energy Density, Intermediate Temperature Na–NiCl 2 Batteries

Journal Article · · Advanced Materials Interfaces
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  1. Electrochemical Materials and Systems Group Energy and Environmental Directorate Pacific Northwest National Laboratory Richland WA 99352 USA
  2. Materials Research Division Research Institute of Industrial Science and Technology Pohang 37673 South Korea

Abstract

Among various battery technologies being considered for stationary energy storage applications, sodium–metal halide (Na–MH) batteries have become one of the most attractive candidates because of the abundance of raw materials, long cycle life, high energy density, and superior safety. However, one of issues limiting its practical application is the relatively expensive nickel (Ni) used in the cathode. In the present work, the focus is on efforts to develop new Ni‐based cathodes, and it is demonstrated that a much higher specific energy density of 405 Wh kg −1 (16% higher than state‐of‐the‐art Na–MH batteries) can be achieved at an operating temperature of 190 °C. Furthermore, 15% less Ni is used in the new cathode formula than that in conventional Na–NiCl 2 batteries. Long‐term cycling tests also show stable electrochemical performance for over 300 cycles with excellent capacity retention (≈100%). The results in this work indicate that these advances can significantly reduce the raw material cost associated with Ni (a 31% reduction) and promote practical applications of Na–MH battery technologies in stationary energy storage systems.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1424802
Alternate ID(s):
OSTI ID: 1455259
Journal Information:
Advanced Materials Interfaces, Journal Name: Advanced Materials Interfaces Journal Issue: 10 Vol. 5; ISSN 2196-7350
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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