| abstract |
A solid state electrochemical cell may comprise a Li or Li-based anode, a lithium ion conducting polymeric electrolyte, and a composite cathode comprising an insertion electrode material such as V6O13 and polymer electrolyte material. To improve contact between the electrode material and the electrolyte material in the composite cathode, the electrode material is functionalised by providing a plurality of silylated hydroxyl groups, the silyl groups having one or more reactive groups capable of bonding to the polymer electrolyte material. For example, unmodified electrode material is reacted with a silylating reagent of the formula R3Si(CH2)nX where R is alkoxy; n is 0, 1 or 2; and X is alkyl, aryl, heterocyclic, amino, or halogeno. Use of such reagents may also reduce the extent of decomposition of the polymer electrolyte. |