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 relatively high, about 2.0 yuan / Wh or more

[0007] During the charging process of the above-mentioned hybrid battery, the negative electrode generates sulfate ions, and the positive electrode generates oxygen free radicals. Using conventional current collectors is easy to corrode.

According to the test, generally after 2 charging and discharging cycles, materials that are not resistant to sulfuric acid such as nickel foam and stainless steel will be severely corroded, resulting in the end of battery life