Anòd metal ityòm konpoze segondè sekirite se pwochen jenerasyon enèji segondè dansite enèji depo batri?
The research group of Professor Zhang Qiang from the Department of Chemical Engineering of Tsinghua University published the paper "Coralloid Carbon Fiber-Based Composite Lithium Anode for Robust Lithium Metal Batteries" in the well-known journal "Joule" in the energy field. Important progress has been made in the field of high-safety and high-capacity composite lithium metal anodes. The research was selected as the cover article of this issue of Joule, and the cover image was published.
Lityòm metal gen kapasite espesifik teyorik trè wo ak potansyèl elektwòd redox ki pi ba a, kidonk li te vin materyèl anod ki pi ideyal pou pwochen -jenerasyon gwo-enèji-pil depo enèji dansite (pwochen). -jenerasyon solid-pil ityòm eta ityòm, ityòm-pil souf, ityòm-pil lè, elatriye). Sepandan, pwoblèm nan dendrite pandan pwosesis la chaje ak egzeyat nan metal ityòm ak enstabilite nan ityòm -fim nan koòdone elektwolit seryezman diminye efikasite nan sik nan ityòm metal pil, diminye lavi sa a ki sèvis nan batri a, e menm pote yon sèten degre nan danje sekirite. anpeche devlopman ityòm metal pil.
The cover picture uses a metaphor to express the design idea of "composite lithium metal negative electrode". The composite lithium metal negative electrode based on lithiophilic carbon fiber is likened to a ship, which can sail stably in the "ocean" of molten lithium.
Dènyèman, chèchè yo te pwopoze yon kantite anod metalik ityòm ki baze sou kad kabòn kondiktif oswa kad metal. Sepandan, anpil nan kad sa yo pa te pre-konplike ak ityòm metalik, men yo te teste nan mwatye-selil kòm ityòm-pèseptè aktyèl gratis. Lityòm-pèseptè aktyèl gratis sa yo difisil pou aplike dirèkteman nan selil plen. Se poutèt sa, ki jan yo efikas pre-konpoze metal ityòm nan estrikti pèseptè aktyèl la pou fòme yon anod metal ityòm konpoze segondè-pèfòmans ki ka dirèkteman rasanble nan yon batri plen te vin konsantre nan rechèch.
An repons a demann ijan pou elektwòd konpoze nan pil metal ityòm, ekip rechèch pwofesè Zhang Qiang nan Inivèsite Tsinghua te pwopoze yon elektwòd negatif metal konpoze ityòm ak koray -tankou fib kabòn fonn ityòm. Sifas kilè eskèlèt fib kabòn (CF) modifye nan yon sifas lithiophilic pa metòd galvanoplastie kouch ajan, se konsa ke likid la fonn ityòm metal ka byen vit absòbe nan eskèlèt fib kabòn (CF/Ag) ak kouch ajan, kidonk kòm yo jwenn pèfòmans segondè Anòd metal ityòm konpoze (CF/Ag-Li).
On the one hand, the silver coating can modify any conductive framework into a lithiophilic conductive framework that can siphon liquid molten lithium. Cyclic morphology of "dead lithium". Through the experimental observation of in-situ metallic lithium deposition, it is found that it is difficult to form dendrites in this composite structure. The proposed composite lithium metal anode can be stably cycled for more than 160 cycles with very low polarization under extremely harsh conditions of 10 mAcm-2 and 10 mAhcm-2. Compared with conventional lithium metal anodes, the composite lithium metal anode can withstand extreme areal current density and areal capacity cycling, showing high safety features.
Coral -tankou fib kabòn fonn ityòm-anòd metal konpoze ityòm ranpli
The composite metal lithium negative electrode is directly assembled with the sulfur positive electrode and the lithium iron phosphate positive electrode to form a lithium{{0}}sulfur battery and a lithium iron phosphate battery with excellent performance. Its lithium iron phosphate battery can stably cycle for more than 500 cycles at a rate of 1.0C, while the lithium-sulfur battery has an initial discharge capacity of 781mAhg-1 at 0.5C, and maintains a high-capacity cycle for more than 400 cycles. The conductive skeleton silver-plated lithium-injection method of this work can be universally applied to the design and preparation of any composite metal lithium anode based on the conductive skeleton. Lithium" cycle appearance, and then obtain excellent electrochemical performance in full battery systems such as lithium-sulfur batteries, and improve the safety of energy storage systems.
