A Low‐Cost Durable Na‐FeCl 2 Battery with Ultrahigh Rate Capability
[1]
- Battery Materials and Systems Group Energy and Environment Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
- Environmental Dynamics &, Simulation Group Environmental Molecular Science Division Pacific Northwest National Laboratory Richland WA 99354 USA
- Chemical &, Biological Processing Group Energy and Environment Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
Abstract Na‐based batteries have long been regarded as an inexpensive, sustainable candidate for large‐scale stationary energy storage applications. Unfortunately, the market penetration of conventional Na‐NiCl 2 batteries is approaching its limit for several reasons, including limited rate capability and high Ni cost. Herein, a Na‐FeCl 2 battery operating at 190 °C is reported that allows a capacity output of 116 mAh g −1 at an extremely high current density of 33.3 mA cm −2 (≈0.6C). The superior rate performance is rooted in the intrinsically fast kinetics of the Fe/Fe 2+ redox reaction. Furthermore, it is demonstrated that a small amount of Ni additive (10 mol%) effectively mitigates capacity fading of the Fe/NaCl cathode caused by Fe particle pulverization during long‐term cycling. The modified Fe/Ni cathode exhibits excellent cycling stability, maintaining a discharge energy density of over 295 Wh kg −1 for 200 cycles at 10 mA cm −2 (≈ C /5).
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- DE‐AC06‐76LO1830
- OSTI ID:
- 1596182
- Journal Information:
- Advanced Energy Materials, Journal Name: Advanced Energy Materials Vol. 10 Journal Issue: 10; ISSN 1614-6832
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
Web of Science
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