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- Title
A High-Voltage and Ultralong-Life Sodium Full Cell for Stationary Energy Storage.
- Authors
Guo, Shaohua; Liu, Pan; Sun, Yang; Zhu, Kai; Yi, Jin; Chen, Mingwei; Ishida, Masayoshi; Zhou, Haoshen
- 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).
- Subjects
STORAGE batteries; ENERGY storage; ELECTRIC potential; SODIUM ions; ELECTRODES
- Publication
Angewandte Chemie International Edition, 2015, Vol 54, Issue 40, p11701
- ISSN
1433-7851
- Publication type
Article
- DOI
10.1002/anie.201505215