▎ 摘　　要

NOVELTY - Preparation of low-temperature-resistant lithium-ion battery involves preparing a low-temperature-resistant electrolyte by mixing lithium salt, nonaqueous organic solvent and low-temperature-resistant additives, spraying nanosilver oxide and/or conductive carbon nanotubes on electrode substrate, spraying a positive electrode slurry containing lithium metal oxide particles on substrate and drying to obtain a positive electrode sheet, spraying nanosilver oxide and/or conductive carbon nanotubes on electrode substrate, spraying a negative electrode slurry containing graphite on substrate and drying to obtain a negative electrode sheet, preparing a diaphragm, a battery case and a battery cover, stacking the positive electrode sheet, the diaphragm and the negative electrode sheet to obtain a battery cell, placing the battery cell in the battery case, injecting the low-temperature-resistant electrolyte into the battery case, and sealing the battery case using the battery cover. USE - Preparation of low-temperature-resistant lithium-ion battery e.g. rechargeable battery. ADVANTAGE - The method improves the conductivity of the electrolyte at low temperature, and ensures the activity of the electrode sheet at the low temperature. The charging and discharging performance of the lithium ion battery is good. The method can keep high ion embedding and de-embedding efficiency, and good charging and discharge performance under the low-temperature condition. DETAILED DESCRIPTION - Preparation of low-temperature-resistant lithium-ion battery involves (i) preparing a low-temperature-resistant electrolyte by mixing 10-15 parts mass lithium salt, 80-90 parts mass nonaqueous organic solvent and 1-5 parts mass low-temperature-resistant additives, (ii) preparing a positive electrode slurry by mixing 88-95 parts mass lithium metal oxide particles, 3-6 parts mass conductive agent, 3-7 parts mass aqueous binder and 1-3 parts mass low-temperature-resistant active agent, (iii) preparing a negative electrode slurry by mixing 89-96 parts mass graphite, 2-5 parts mass conductive agent, 3-8 parts mass polymer, 1-3 parts mass cellulose, 2-6 parts mass aqueous binder and 1-3 parts mass low-temperature-resistant active agent, (iv) placing an aluminum foil in a weak acid solution and deionized water to clean oxide layer on the surface, placing cleaned aluminum foil in a closed space filled with inert gas, and using a high-temperature airflow comprising an inert gas to dry the aluminum foil to obtain a clean aluminum sheet, (v) using inert gas to carry pure aluminum particles to spray onto surface of the clean aluminum sheet in a closed space, such that the surface of the clean aluminum sheet forms a rough structure surface to obtain an electrode substrate, (vi) spraying nanosilver oxide and/or conductive carbon nanotubes on surface of electrode substrate in enclosed space, spraying the positive electrode slurry on the electrode substrate and drying to obtain a positive electrode sheet, (vii) spraying nanosilver oxide and/or conductive carbon nanotubes on surface of electrode substrate in enclosed space, spraying the negative electrode slurry on the electrode substrate and drying to obtain a negative electrode sheet, and (viii) preparing a diaphragm, a battery case and a battery cover, stacking the positive electrode sheet, the diaphragm and the negative electrode sheet to obtain a battery cell, placing the battery cell in the battery case, injecting the low-temperature-resistant electrolyte into the battery case, and sealing the battery case using the battery cover.