Journal
MATERIALS TECHNOLOGY
Volume 35, Issue 13-14, Pages 836-842Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/10667857.2019.1701255
Keywords
Li; CFx primary battery; MnO2-nanowires; hydrothermal method; surface modification; high energy density
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Funding
- Education Department of Hunan Province [16C1525]
- National Natural Science Foundation of China [11872054, 11902283, 11602213]
- Natural Science Foundation of Hunan Province [2019JJ50578]
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CFx@MnO2-nanowires composite materials are designed and synthesized for high energy density and high power density primary lithium batteries. The MnO2-nanowires intertwine with each other and coated on the surface of CFx tightly, which not only provides capacityand improved the discharge voltage platform, but also forms a suitable three-dimensional conductive framework and improves the wettability of the surface of CFx. Thus, the discharge rate of CFx@MnO2-nanowires composite cathode can reach up to 6 C, and presents excellent electrochemical properties with a maximum energy density of 1613.9 Wh/kg and a maximum power density of 9781.0 W/kg, which is much higher than the pristine CF(x )cathode. In addition, the composite cathode exhibits an incredible discharge performance at high and low temperatures with a discharge specific capacity of 650 mAh/g at -30 degrees C and 950 mAh/g at 100 degrees C, which proves that it can be utilized normally in harsh conditions.
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