Polymer lithium-ion batteries refer to lithium-ion batteries that use solid polymer electrolyte (SPE) as the electrolyte. The battery is composed of a positive electrode current collector, a positive electrode membrane, a polymer electrolyte membrane, a negative electrode membrane, and a negative electrode current collector. The battery is pressed and compositely formed, and is wrapped with an aluminum-plastic composite film and its edges are heat-melted and sealed to obtain a polymer lithium-ion battery. Since the electrolyte membrane is solid, there is no leakage problem, and the battery design has greater freedom. It can be connected in series and parallel or adopt a bipolar structure as needed.
Polymer lithium-ion batteries have the following characteristics: ① Shaping flexibility; ② Higher mass specific energy (3 times that of MH-Ni batteries); ③ Wide electrochemical stability window, up to 5V; ④ Perfect safety and reliability; ⑤Longer cycle life and less capacity loss; ⑥High volume utilization; ⑦Wide application fields.
Its working performance indicators are as follows: working voltage: 3.8V; specific energy: 130Wh/kg, 246Wh/L; cycle life: >300; self-discharge: <0.1%/month; working temperature: 253-328K; charging speed: 1h 80% capacity; 3h to reach 100% capacity; Environmental factors: non-toxic.
