Solid electrolyte hian liquid electrolyte aiin thatna tam tak a nei a. Entirnan, charging leh discharging laiin electrode deformation an tihziaawm thei a, hei hian himna a ti tha hle. Tin, stability tha tak an nei bawk a, process awlsam tak an ni a, an thanlenna pawh an nei tha hle bawklithium hmanga siam a nidendrites hi solvent-free solid polymer electrolyte-ah chuan a tlem thei ang bera siam theih a ni.
Polymer electrolyte chungchanga zirchianna hi kum 1973 atang khan tan a ni a, chutih lai chuan Fenton et al. an hmuchhuak a, alkali metal nena polyethylene oxide (PEO) complex-in ion a hruai thei tih an hmuchhuak. Chumi hnuah chuan polymer electrolyte hian ngaihven a hlawh hle.
Kum 1978 khan Dr. Armand chuan PEO-based solid-state polymer electrolytes chu battery atana electrolyte atan hman theih a nih thu a lo sawi lawk tawh a.
Kum sawmhnih chhung zet chu zirchiangtute chuan ion conduction mechanism leh battery chhunga electrolyte-electrode boundary physicochemical property zir chianna kawngah nasa takin hma an la a, hmasawnna tha tak an nei a ni.
Solid polymer electrolyte hmanga lithium-ion battery hian liquid electrolyte nena inzawm leakage problem a veng thei a ni.
Polymer hi process a awlsam a, miniaturized theih a ni bawk. Plasticity sang tak an neih avangin polymer te hi thin-film battery siam nan pawh hman theih a ni. Battery structure hrang hrang chu polymer electrolyte hmangin application mamawh hrang hrang phuhruk nan siam theih a ni. Chubakah, polymer electrolyte hian liquid electrolyte nena khaikhin chuan chemical, electrochemical, leh thermal stability sang zawk a pe a, electrode nena side reaction a nei tlem zawk a, operating temperature range pawh a zau zawk bawk. Polymer electrolyte te flexibility hian charge leh discharge laiin electrode-a volume inthlak danglamna chu a buffer thei a, battery structure a ti nghet thei a ni. Chuvangin, liquid-ion battery sumdawnna atana hman a nih hnuah, polymer electrolyte hmanga siam lithium-ion battery technology chu rang takin a lo thang chho ang a, sumdawnna hlawhtling tak a thleng ang.
Polymer electrolyte chi hrang hrang thliar hran dan chi hrang hrang a awm a, standard pawh a inang lo. Tunah hian solid polymer electrolyte te hi polymer hman chi hrang hrang a zirin an thliar hrang ber a, chu chu polyether-based polyethylene oxide (PEO) lar ber a ni a, chubakah polymethyl methacrylate (PMMA) leh polyacrylonitrile (PAN) te pawh a ni. A tlangpuiin, polymer electrolyte te hian lithium-ion battery-a hman tangkai theih nan a hnuaia thil awmte hi an tlin a ngai a ni.
Ionic conductivity sang tak a ni
Lithium-ion transference number ngaihtuah tham tak a ni
Mechanical chakna tha tak a ni
Electrochemical window zau tak a ni
Chemical leh thermal stability tha tak a ni
Tuna polymer electrolyte system-ah hian polymer-te hian room temperature-ah crystallinity nasa tak an lantir a, hei hian room temperature-a solid polymer electrolyte-te conductivity chu liquid electrolyte aiin a hniam zawk chhan a sawifiah a ni. Polymer-a crystal tam zawk hi spherulites an ni a, an inkarah hian amorphous region a awm. A tlangpuiin lithium-ion conduction hi heng amorphous region-ah hian a thleng ber niin an ngai.
Chuvangin, polymer-te phase structure hriatthiam hi lithium-ion conduction mechanism zir chianna atan a \\angkai hle.
Binary polymer electrolyte system tan chuan phase structure hi chi hnih a awm ber a, chungte chu crystalline region leh amorphous region te an ni. Crystalline region siam dan hi kinetically driven a ni a, specific preparation conditions leh time nen a inzawm tlat a ni. Strict takin sawi ila, polymer system-a crystalline region awm vang te, leh condition hrang hranga heng region-te hi a danglamna nasa tak avang te hian polymer electrolyte chi hrang hrangte conductivity tehkhin hi scientific tak a ni lo. Mahse, dinhmun thenkhatah chuan crystalline region te lo thang chak lo a, ionic conductivity-a deviation chu pawm theih range chhunga awm a nih chuan conductivity tehkhin chu pawm theih a ni. Hei vang hian result hrang hrang kan khaikhin fo thin.
Polymer chhunga spherulites te lo thang lian hi hun-a innghat a nih avangin polymer melting point hnuai lam temperature-a ionic conductivity pawh hun-a innghat a ni. Chubakah, polymer electrolyte-a lithium-ion conductivity hi heating rate, cooling rate leh relaxation time nen a inzawm a ni. Entirnan, relaxation time rei zawk chuan polymer crystal structure kimchang zawk leh crystallinity sang zawk a siam a, chu chuan relaxation time a san chuan ionic conductivity chu a tlem berah a tlahniam zauh zauh a ni. Chutiang bawkin cooling rate slow zawk chuan crystallization kimchang zawk a thlen a, a inmil ionic conductivity pawh a tlahniam zauh zauh ang a, a tlem berah a tlahniam bawk ang.
PEO leh LiCIO4-a binary solid polymer electrolyte hi entirnan la ila, he structure hian phase structure hrang hrang a nei a ni. Pakhatnaah chuan LiClO4 leh PEO hian complex hrang hrang an siam thei a, chung zingah chuan PEO6-LiCIO4, PEO3-LiCIO4, PEO2-LiCIO4, leh PEO-LiClO4 te pawh an tel. Chumi zingah chuan O:Li=10:1 a nih chuan PEO6-LiCIO4 hian PEO nen eutectic a siam thei a, a melting point chu 50℃a ni. Chu bakah, a lumna chu 160℃-a tihsan a nih chuan eutectic lian tak a lo awm thei bawk. Cooling process chhung hian eutectic lian tak hian spherulites chi hrang hrang pathum a siam chhuak ang: chi khatna chu 120℃aia sangin a hmin a, chi a tam hle a chi hnihna chu 45 leh 60℃inkarah a hmin a, chi a tlem a, zawi zawiin a lo piang chhuak a; chi thumna hian host polymer aiin melting point a hniam deuh a, a lo piang chak zawk. Research leh analysis atanga a lan dan chuan: spherulite chi khatna chu PEO3-LiCIO4 a nih a rinawm; chi hnihna chu PEO-LiCIO4 leh PEO3-LiCIO4 complex inzawmkhawm a ni thei a; leh chi thumna chu PEO ngei nen a inmil bawk. Chubakah, lithium salt awm zat leh heat treatment process hian structural change a thlen thei bawk.
Polymer electrolytes hi functional polymer material class pakhat, ionic conductivity sang tak nei, polymer leh metal salt inkara complexation reaction atanga polymers matrix atana hmanga siam a ni. Polymer matrix a zirin polymer electrolyte hman tlanglawn tak takte chu PEO-based polymer electrolyte, PVDE-based polymer electrolyte, PMMA-based polymer electrolyte leh a dangte an ni. Inorganic solid-state electrolyte ang lo takin polymer electrolyte hi a rit lo va, a elastic a, a nghet bawk. Inorganic solid-state electrolyte ang bawkin polymer electrolyte hian lithium-ion battery-a ion a conduct mai bakah battery separator angin a thawk bawk. Polymer electrolyte hian a bik takin a hnuaia thatnate hi a nei a ni.
Lithium-ion battery-a lithium dendrite siam chhuahna buaina chu \\ha takin a chinfel thei a ni
Lithium-ion battery charging leh discharging process-a deformation awm danah a insiamrem tha thei hle
Lithium-ion battery-a electrolyte leh electrode material inkara chemical reaction awm chu a tihtlem thei a, a ti bo thei bawk
Safety performance sang tak a nei a ni
PEO nena lithium salt hrang hrang (LBF4, LIPF6, LiCFSO4, leh LiASF6 telin) siam complex te hi a bul berah chuan LiCIO4 siam nen an inang a, chu chu lithium salt chi hian PEO nena complex siam chi hrang hrangah direct impact a nei lo tihna a ni. A bik takin LiBF hian PEO nen hian complex pahnih a siam thei a, chungte chu PEO4-LIBF leh PEO,S-LiBF te an ni. O/Li ratio 16 leh 20 inkar a nih chuan PEO2.5-LIBF4 hian PEO nen eutectic a siam thei a ni. LPF6 hian PEO nen hian complex pahnih a siam thei bawk a, chungte chu PEO6-LiPF6 leh PEO:-LiPF6 te an ni. PEO nena LiASF6 siam complex pahnih hi LiPF6 nen a inang a, mahse melting point a sang zawk hle. Anion lithium salt lian tak takte pawhin PEO nen complex an siam thei a, mahse kinetics erawh a slow zawk hle. Chubakah, pressure hian crystal growth pawh eng emaw chen a nghawng bawk. Pressure sang zawk hian spherulite a tipung a, amorphous region a tihtlem a, chutiang bawkin lithium-ion conductivity a tihhniam bawk.