Liquid electrolyte chu eng nge ni?
Liquid electrolyte 1000 a ni.
(1) Chemical composition liquid electrolyte hi electrolyte solution an ti bawk. Lithium-ion battery-a organic liquid electrolyte hman tlanglawn tak a ni a, non-aqueous liquid electrolyte tia hriat a ni bawk. Organic liquid electrolyte hi lithium salt, organic solvent, leh additives atanga siam a ni a, a siam dan pawh a tha hle.
1 Lithium Salt: A bik takin conductive ion a pe a. Lithium hexafluorophosphate hi sumdawnna atana hman tam ber a ni a, chu chu sumdawnna atana hman tam ber a ni-ion battery te hi a ni. Pure LIPF6 hi white crystal a ni a, organic solvent-ah a inthiar thei a, chungte chu low-alkyl ethers, nitriles, pyridine esters, ketones, leh alcohols te an ni a, mahse alkanes leh benzene ang chi organic solvent-ah chuan a soluble tlem hle. LIPF6 electrolyte hian conductivity a nei sang hle a; 20℃ah chuan EC+DMC (volume ratio 1:1) conductivity chu 10×10-2s/cm a tling thei. Conductivity hian electrolyte concentration 1mol/L a hnaih chuan a maximum a thleng tlangpui. LIPF6 hian electrochemical performance a nei nghet a, tuna collector awm mek chu a tichhe lo. Mahse, LIPF6 hian thermal stability tha lo tak a nei a, tuiah awlsam takin a chhe thei a, buatsaih leh hman laiin environment moisture content khauh taka control a ngai a ni.
2 Organic solvents: An hnathawh ber chu lithium salt te chu a hmin a, lithium salt electrolyte chu conductive ion a siam thei a ni.
Solvent hman tam ber chu propylene carbonate, dimethyl carbonate, leh diethyl carbonate te an ni.
Organic solvents hi a tlangpuiin an dielectric constant sang leh viscosity hniam vangin an thlang thin. Dielectric constant sang zawk chuan lithium salt te chu a hmin leh a hmin loh a awlsam phah a; Viscosity hniam zawk chuan ion migration a ti chak zawk thin. Mahse, a takah chuan dielectric constant sang tak nei solvent te hian viscosity sang tak an nei a, viscosity hniam tak nei solvent te hian dielectric constant hniam tak an nei bawk. Chuvangin, solvent pakhat tan chuan heng thil mamawh zawng zawng hi a ruala tihhlawhtlin a harsa hle. Lithium-ion battery hian a tlangpuiin organic solvent, dielectric constant sang tak nei leh component tinte tlakchhamna phuhruk nan viscosity hniam tak nei te an hmang thin. Entirnan, EC carbonate hian dielectric constant sang tak a nei a, hei hi lithium salt dissociation atan a \\angkai a, DMC, DEC, leh EMC carbonate te erawh chuan viscosity hniam tak an nei a, hei hian lithium ions migration rate tihsan nan a \\angkai hle.
3 Additives: A tlangpuiin electrolyte-a electrical leh safety performance tihchangtlun leh tihchangtlunna kawngah an chanvo an nei tlangpui. A tlangpuiin additives hian hna pawimawh pathum an nei a, chungte chu AA SEI membrane hnathawh dan siam that a ni a, chu chu vinylene carbonate (VC), vinyl sulfite (ES), leh SO2 te dah belh a ni a b. overcharging (biphenyl dah belh) leh over-discharging tih loh tur; c. Flame retardant additives hian battery a kang thei lo emaw, a puak thei lo emaw a ni thei a, chu chu halogenated flame retardants, phosphorus-based flame retardants, leh composite flame retardants te dah tel a ni d. Electrolyte chhunga trace water leh HF awm zat tihtlem.
