| Autor: |
Yang, Xiaowu, Xin, Yan, Zhang, Xing, Wang, Xia, Wang, Chen |
| Zdroj: |
Ionics; Feb2019, Vol. 25 Issue 2, p429-435, 7p |
| Abstrakt: |
In order to reduce the weight of the lithium-ion battery and increase its capacity, the copper foil as a conventional current collector is completely abandoned, and a novel ultralight negative electrode prepared by freeze-drying technology and carboxymethyl cellulose (CMC) has a 3D sponge-like structure. Further, graphite is employed as an electrode material. X-ray diffraction and Raman spectroscopy show no damage to the graphite structure during the formation of the carbon sponge. The thin layer of acetylene black deposit acts as a current collector and allows graphite to maximize contact with the electrolyte. In the half-cell experiment, this new 3D CMC spongy ultralight collector-free electrode achieves considerable cyclical stability. This paper describes innovative and fairly simple techniques to fully realize 3D CMC sponge-like current collector applied in lithium-ion battery, rather than relatively heavy and expensive copper foil, thereby improving the weight and volumetric energy density of such advanced batteries. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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