Dendritic Inhibition And Electrochemical Properties Of Lithium Metal Anode Electrolyte Additive

With the rapid development of electric vehicles and all walks of life and improve the electronic equipment requirements,the demand for lithium-ion batteries not satisfied with the current development status,so the research and development of higher-performance lithium battery materials has been particularly critical.Since the lithium metal has the advantage of high capacity and low potential at the negative electrode of lithium metal battery,lithium metal is considered promising next generation electrode material candidates.However,security issues,as well as lower cycle life of lithium dendrites grow uncontrolled studies need to focus on a problem to solve.This paper will use a film-like substance as an electrolyte additive for inhibiting the growth of lithium metal anode batteries are lithium dendrites,thereby increasing the cycle stability of the battery,the cycle life and safety.In this article three different material as the electrolyte additive,respectively,have been used commercially mixed fiber microporous membrane,a polyacrylonitrile,manganese dioxide,and NN-dimethylformamide electrospinning prepared and a polyacrylonitrile film,magnesium fluoride and NN-dimethylformamide electrospinning resulting film.Respectively,three kinds of copper added film Cu|Li batteries and Li|Li batteries as an electrolyte additive,by observing the growth of the internal battery charge-discharge cycle of lithium dendrites analysis of three different lithium electrolyte additive sticks crystal inhibition mechanism.Paper analyzes the changes in the cycle stability and cycle life of the battery before and after the addition of the additive according to the three different electrochemical tests.Mixed fiber microporous membrane made from microporous membrane electrolyte additive minimum battery interface resistance 29?·cm²,and the resistance of SEI layer described charge transfer resistance from the electrode and the electrolyte decreases,facilitate the accumulation of particles,stability coulombic efficiency of the battery,the average Coulomb maximum efficiency of about 99%.Stabilized voltage fluctuation and improves safety of the battery,long cycle life.MnO₂ was added as electrolyte additive spinning cell forming the interface resistance is small,it can inhibit the growth of lithium dendrites,uniformly deposited lithium,coulombic efficiency of Cu|Li batteries is 96%higher,good cycle stability,Li|Li battery cycle life is longer than others.Add battery interface resistance spinning MgF₂ deposition as electrolyte additives is a maximum of three additives in 200?·cm²,but it can also inhibit the growth of lithium dendrites,and high coulombic efficiency of the battery is 95%,better cycling stability,and longer cycle life.Thus,mixed fiber microporous membrane made of the electrolyte additive effect of suppressing lithium dendrite Preferably,Cu|Li battery coulombic efficiency exhibited the most stable,Li|Li battery exhibited minimal voltage fluctuations,safety the highest,longest cycle life.