▎ 摘　　要

NOVELTY - Ionic cross-linked polymer i.e. O-(1-hydroxypropyl)hydroxylammonium compound (I), is new. USE - (I) is useful in preparing high-capacity lithium-ion battery conductive adhesive and high-capacity lithium-ion battery electrode sheets for lithium-ion battery (all claimed). ADVANTAGE - The ionic cross-linking polymer has excellent flexibility, excellent bonding performance, excellent conductivity, and excellent adhesive properties. The lithium-ion battery conductive adhesive agent material has excellent cycle stability and multiplying power performance in the ultra-high load electrode and the super-thick electrode. DETAILED DESCRIPTION - Ionic cross-linked polymer i.e. O-(1-hydroxypropyl)hydroxylammonium compound of formula (I), is new. R = hydroxyalkyl, oxohydroxyalkyl or alcoholaminoalkyl. INDEPENDENT CLAIMS are included for: 1. high-capacity lithium-ion battery conductive adhesive comprising the ionic cross-linked polymer and a conductive material, the conductive material is a carbonaceous material, preferably carbon nanotubes, graphene, carbon aerogel, and/or MXene; 2. preparation of high-capacity lithium-ion battery conductive adhesive, comprising (i) mixing polyacrylic acid i.e. propionic acid compound of formula (III) and the ammonia-based monomer i.e. amine compound of formula (II) in a liquid phase medium to carrying out a polymerization reaction to obtain (I), and (ii) dissolving (I) to obtain a polymer solution, and then adding a conductive material for compounding to obtain final product; 3. use of high-capacity lithium-ion battery conductive adhesive for preparing high-capacity lithium-ion battery electrode sheets, comprising dissolving high-capacity lithium-ion battery conductive adhesive in water (preferably deionized water), and mechanically stirring to obtain adhesive solution, then grinding evenly the cathode active material and adding to the adhesive melt, and the stirring until a slurry with a uniform surface and good ductility, uniformly coating the slurry on the current collector, and then drying to obtain high-capacity lithium-ion battery cathode sheet; and 4. lithium-ion battery, comprising high-capacity lithium-ion battery cathode sheet.