Kuchaja lithium bhatiri anode zvinhu kuwedzera kwakaoma kukunda nzira itsva yeUnited States neChina R <000000> D timu.

Awdur: Iflowpower - Mofani oa Seteishene sa Motlakase se nkehang

Zvinoenderana nevekunze mishumo yenhau, sezvo silicon ine yakakwira simba density, yave inoyevedza kwazvo lithium-ion bhatiri anode zvinhu. Nekudaro, munguva yekuchaja, iyo yekuwedzera shrinkage inogona kusvika 300% kana silicon iri muchitokisi ichidyidzana ne lithium. Uye nekufamba kwenguva, zvichanyanya kuderedza kushanda, kupfupika kwebhatiri, uye pakupedzisira kutungamirira kumarara ebheteri.

Kuti uvandudze kuipa kwepamusoro uye kazhinji kuchengetedza kusimba kwesimba rebhatiri, anode yerithium-ion bhatiri iri kushandiswa uchishandisa silicon monoxide (SiOx, X≈1). Iko kushandiswa kwesilicon-based oxide anode kwakakwira zvakanyanya, uye kuita kutenderera kunovandudzwa zvakare. Nekudaro, izvo zvinyorwa hazvisati zvichidzivirira kushanduka kwevhoriyamu, uye isina simba conductivity haina kusimba.

Nhamba huru yebasa rekutsvagisa rakaitwa kugadzirisa matambudziko ari pamusoro pehunyanzvi. Nhasi, timu yekutsvagisa munyika yangu neUnited States yakaburitsa tsvakiridzo mhinduro uye yakawana nzira mbiri nyowani dzekuvandudza. Mhedzisiro yekutsvagisa yechikwata cheUS: Isiri-inonamira silica oxide / kabhoni yakaoma Kentucky University (UNIVERSITYE) timu yekutsvagisa Mushure mekusanganisa silicon-based oxide particles uye kraftlignin, synthesizing yakakwira performance non-bonded Silicon-based oxide / carbon complex (Binder-freesiox / c) yekugadzira maelectrodes e lithium ion mabhatiri.

Mushure mekurapwa kwekupisa, iyo lignin inoumba inoitisa muviri (ConductiveMatrix), iyo inogona kugarisa nhamba yakakura yesilicon-based oxide particles kuti ive nechokwadi chemagetsiconductivity, kubatana, uye kuchinjika kune lithiation / deodentation reaction panguva ye lithiation / Delithiation. Kuchinja kwevhoriyamu. Ichi chinyorwa hachidi kushandisa mabhainda enguva dzose kana makondukita.

Kuita kwe electrode yakagadzirwa necomposite material kwakanyanyisa kunaka. Kana ichienzaniswa neiyo diki silicon-based oxide electrode (160%) yehuwandu hwekuchinja kwehuwandu, iyo mechanical electrochemical properties yakanakisa, iyo ferbonmatrix yakakura, uye inogona kuchinjirwa kuhuwandu hwekuchinja. Mhedzisiro yekutsvagisa kwechikwata chedu: Micro SiOx / C Cabens (Core-Shell) Inoumba timu yekutsvagisa yenyika yangu yakagadzira mhinduro inoshanda yekugadzirira micro SiOx / C core shell complex.

Boka rekudzidza rakasanganisa citricacid uye bhora rekugaya silicon-based oxide rakaita kabhoni, richiteverwa neyakagadzirwa SiOx / C-core shell complex - SiOx micro core uye citrate kabhoni CONFORMALCARBONSHELL. Iyo kabhoni shell yakawedzera zvakanyanya magetsi conductivity yesilicon-based oxides, uye vhoriyamu shanduko mukuchinjika kune lithiuming / deod lithium reaction. Ma electrode akagadzirwa neSiOx / C yakaoma ndeye 1296.

3mAh / g, uye COMBICEFFICIENCY yakakwira kusvika 99.8%, uye chiyero chekuchengetedza simba i65.1% (843.

5mAh / g) mushure mekuchaja uye kuburitsa ndeye 200 nguva. Zvinoenderana nechikwata chekutsvagisa, kuburitsa kweiyo yakaoma kwakanyanya kunaka. Iyo nzira inogona kuwana kugadzirwa kwakawanda, inodhura-inoshanda, inogona kuburitsa yakakwirira-inoshanda anode zvinhu zvakagadzirwa kubva kuSiOx / C yakaoma composite.