A computer-implemented system and method provides authoritative answers, developed within a community-based question answering service to users of a general network information search. The liquid developer of the present invention comprises: an insulating carrier liquid; toner particles insoluble in the insulating carrier liquid, and containing a colorant and a binder resin; and at least one of a silane coupling agent and an alkoxy-modified silicone. It also provides a lithium-ion secondary battery using this macroporous graphite electrode material.