Water system lithium-ion hybrid battery

Abstract

The invention discloses a water system lithium-ion hybrid battery, and belongs to the technical field of hybrid batteries. The water system lithium-ion hybrid battery comprises a positive plate and a negative plate, the positive plate is composed of a positive current collector and a positive active substance, the negative plate is composed of a negative current collector and a negative active substance, and the positive current collector is plated with terne metal; the negative active substance is prepared from, by mass, 80-90% of lead sulfate, 0.05-0.15% of barium sulfate, 2-10% of binder, 1-10% of conducting agent and 0.1-0.5% of organic expanding agent. A positive pole of the hybrid battery is made of a lithium-ion battery positive pole material, a negative pole is made of a negative pole material of a lead storage battery, the energy density of the battery reaches 70 Wh/kg or more and is about twice that of the lead storage battery, the cycle life is larger than 1000 times, the cost is about 0.6 yuan/Wh and is slightly higher than that of the lead storage battery while remarkably lower than that of the traditional lithium-ion battery, and safety is excellent.

Description

technical field [0001] The invention relates to the technical field of hybrid batteries, in particular to an aqueous lithium-ion hybrid battery. Background technique [0002] A lithium-ion battery is a secondary rechargeable battery that primarily relies on the movement of lithium ions between the positive and negative electrodes to function. During the charging and discharging process, Li + Intercalation and deintercalation back and forth between two electrodes: when charged, Li + It is deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. Batteries generally use materials containing lithium elements as electrodes, which are representatives of modern high-performance batteries. The electrolyte often uses lithium salts, such as lithium perchlorate (LiClO 4 ), lithium hexafluorophosphate (LiPF 6 ), lithium tetrafluoroborate (Li...

AI Technical Summary

Problems solved by technology

However, lithium-ion batteries have the following disadvantages: 1. Due to the use of organic electrolyte, the safety is low; 2. The high-current capability of lithium-ion batteries is poor, and it is easy to break down the diaphragm during high-current discharge or charging, making lithium-ion batteries Damage; 3. The charging voltage is too high, which will easily cause the lithium battery to swell, making it unusable, and a protective plate is needed during use; 4. The manufacturing cost is ...