A High-Voltage and Ultralong-Life Sodium Full Cell for Stationary Energy Storage

Shaohua Guo, Pan Liu, Yang Sun, Kai Zhu, Jin Yi, Mingwei Chen, Masayoshi Ishida, Haoshen Zhou

    Research output: Contribution to journalArticlepeer-review

    105 Citations (Scopus)

    Abstract

    Recently, there has been great interest in developing advanced sodium-ion batteries for large-scale application. Most efforts have concentrated on the search for high-performance electrode materials only in sodium half-cells. Research on sodium full cells for practical application has encountered many problems, such as insufficient cycles with rapid capacity decay, low safety, and low operating voltage. Herein, we present a layered P2-Na0.66Ni0.17Co0.17Ti0.66O2, as both an anode (ca. 0.69 V versus Na+/Na) and as a high-voltage cathode (ca. 3.74 V versus Na+/Na). The full cell based on this bipolar electrode exhibits well-defined voltage plateaus near 3.10 V, which is the highest average voltage in the symmetric cells. It also shows the longest cycle life (75.9 % capacity retention after 1000 cycles) in all sodium full cells, a usable capacity of 92 mAh g-1, and superior rate capability (65 mAh g-1 at a high rate of 2C). In full flow: A sodium full cell based on Na0.66Ni0.17Co0.17Ti0.66O2 as both the cathode and anode has been designed. It exhibits the highest average voltage of approximately 3.10 V in the symmetric cells and the longest cycle life (75.9 % capacity retention after 1000 cycles) in all reported sodium full cells, and also shows a usable capacity and superior rate capability.

    Original languageEnglish
    Pages (from-to)11701-11705
    Number of pages5
    JournalAngewandte Chemie - International Edition
    Volume54
    Issue number40
    DOIs
    Publication statusPublished - 2015 Sep 1

    Keywords

    • batteries
    • electrochemistry
    • sodium
    • stationary energy storage
    • ultralong cycle life

    ASJC Scopus subject areas

    • Catalysis
    • Chemistry(all)

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