Suppressive effect of lithium phosphorous oxynitride at carbon anode on solvent decomposition in liquid electrolyte
2002; Elsevier BV; Volume: 112; Issue: 2 Linguagem: Inglês
10.1016/s0378-7753(02)00421-4
ISSN1873-2755
AutoresKwang-il Chung, Jong-Guen Park, Woo-Seong Kim, Yung‐Eun Sung, Yong‐Kook Choi,
Tópico(s)Advanced Battery Technologies Research
ResumoThe irreversible capacity during the first cycle is investigated at a carbon electrode in a Li-ion battery in 1 M LiPF6/EC:DEC (ethylene carbonate:1,2 diethyl carbonate; 1:1 volume ratio). Solvent decomposition is one of main causes of the initial irreversible capacity. A lithium phosphorus oxynitride (LiPON) thin-film, which is a solid ionic conductor, is deposited on the surface of the carbon electrode by means of a radio frequency magnetron sputtering system. The effect of the LiPON layer is examined with chronopotentiometry and cyclic voltammetry, as well as with scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and X-ray diffraction (XRD). The deposition of LiPON on the surface of the carbon electrode results in a decrease in the initial irreversible capacity due to the suppression of solvent decomposition on the electrode surface.
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