Peripherally polymerized octacyanophthalocyanine as cathode material of lithium rechargeable batteries

Citation
Y. Asai et al., Peripherally polymerized octacyanophthalocyanine as cathode material of lithium rechargeable batteries, POLYM ADV T, 12(3-4), 2001, pp. 259-265
Citations number
8
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
POLYMERS FOR ADVANCED TECHNOLOGIES
ISSN journal
1042-7147 → ACNP
Volume
12
Issue
3-4
Year of publication
2001
Pages
259 - 265
Database
ISI
SICI code
1042-7147(200103/04)12:3-4<259:PPOACM>2.0.ZU;2-N
Abstract
Highly pure metal-free octacyanophthalocyanine (H2PcOC) was further convert ed into two-dimensional polymers (PPcCN) by solid-phase reaction in presenc e of tetracyanobenzene. PPcCN showed the electric conductivity as high as a bout 5.10(-4) S cm(-1), 2-orders of magnitude larger than that of H2PcOC. S ince PPcCN exhibited reversible multi-electron redox reaction at relatively positive potential near -0.3 V vs. NHE and was insoluble throughout the re dox reaction in any ic electrolyte solutions, this polymer is useful in lit hium (ion) rechargeable batteries as cathode-active material. When the dept h of discharge was controlled to 150 mAh g(-1), the cell composed of [metal lic Li/electrolyte/PPcCN] gave very stable cycle property for several hundr ed charge-discharge cycles with the average output voltage of 2.73 V and th e energy density of 409 Wh kg(-1) of which value is comparable to commercia l lithium ion batteries based on Li-x(CoO2)(y) cathode. Copyright (C) 2001 John Wiley & Sons, Ltd.