Discharge capacity of polyparaphenylene-based carbonelectrode for lithium ion battery

摘要

Polyparaphenylene (PPP)-based carbon is expected as a high performance material of a negative electrode ofrnlithium (Li) ion secondary battery. The electrochemical properties of negative electrode consists of PPP-basedrncarbon are strongly influenced by the heat treatment process of the raw material. Therefore, it is important tornestablish the suitable heat treatment process of PPP to realize the high performance electrode. The electrochemicalrnand electrical characteristics of PPP samples were studied after heat-treatment at the temperatures between 660 andrn900C. The large discharge capacity value was obtained, when the samples with heat treatment temperaturesrn(HTTs) of around 700C were used as the negative electrodes. From the measurements of electrical resistivity andrnthe observations of the structure for PPP-based carbon, the relation between these characteristics and HTT wasrndiscussed.