Insights into the structural effects of layered cathode materials for high voltage sodium-ion batteries
Autor: | Shi-Gang Sun, Khalil Amine, Ismael Saadoune, Tianyuan Ma, Xiaoyi Zhang, Yue-Feng Xu, Jihyeon Gim, Jianzhao Liu, Steve M. Heald, Rachid Amine, Abderrahim Solhy, Gui-Liang Xu, Yang Ren, Zonghai Chen, Cheng-Jun Sun, Wenjuan Liu Mattis, Yuzi Liu |
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Rok vydání: | 2017 |
Předmět: |
Battery (electricity)
Diffraction Materials science Renewable Energy Sustainability and the Environment High voltage 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Pollution Cathode 0104 chemical sciences law.invention Nuclear Energy and Engineering Chemical engineering law Phase (matter) Forensic engineering Environmental Chemistry Thermal stability 0210 nano-technology Power density |
Zdroj: | Energy & Environmental Science. 10:1677-1693 |
ISSN: | 1754-5706 1754-5692 |
Popis: | Cathode materials are critical to the energy density, power density and safety of sodium-ion batteries (SIBs). Herein, we performed a comprehensive study to elucidate and exemplify the interplay mechanism between phase structures, interfacial microstrain and electrochemical properties of layered-structured NaxNi1/3Co1/3Mn1/3O2 cathode materials for high voltage SIBs. The electrochemical test results showed that NaxNi1/3Co1/3Mn1/3O2 with an intergrowth P2/O3/O1 structure demonstrates better electrochemical performance and better thermal stability than NaxNi1/3Co1/3Mn1/3O2 with P2/O3 binary-phase integration and NaxNi1/3Co1/3Mn1/3O2 where only the P phase is dominant. This result is caused by the distinct interfacial microstrain development during the synthesis and cycling of the P2/O3/O1 phase. In operando high energy X-ray diffraction further revealed that the intergrowth P2/O1/O3 cathode can inhibit the irreversible P2–O2 phase transformation and simultaneously improve the structure stability of the O3 and O1 phases during cycling. We believe that interfacial microstrain can serve as an indispensable bridge to guide future design and synthesis of high performance SIB cathode materials and other high energy battery materials. |
Databáze: | OpenAIRE |
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