Boka rekutsvagisa rinotungamirwa naProfessor CHEN Wei paYunivhesiti yeSainzi neTekinoroji yeChina (USTC) yakaunza imwe itsva kemikari bhatiri system inoshandisa hydrogen gasi seanode. Chidzidzo chacho chakabudiswa muAngewandte Chemie International Edition.
Hydrogen (H2) yakawana kutariswa seyakagadzika uye inodhura-inoshanda renewable simba mutakuri nekuda kweiyo yakanaka electrochemical properties. Nekudaro, mabhatiri echinyakare ehydrogen-based anonyanya kushandisa H2se cathode, iyo inodzikamisa voltage yavo kusvika 0.8-1.4 V uye inodzikamisa yavo yese yekuchengetedza simba. Kukunda kudzikisira, timu yekutsvagisa yakaronga nzira itsva: kushandisa H2seanode yekuwedzera zvakanyanya simba density uye kushanda voltage. Kana yapetwa nelithium simbi seanode, bhatiri rairatidza kusarudzika kwe electrochemical performance.
Schematic yebhatiri reLi-H. (Mufananidzo neUSTC)
Vatsvagiri vakagadzira prototype Li-H bhatiri system, inosanganisira lithium simbi anode, platinamu-yakavharwa gasi diffusion layer inoshanda sehydrogen cathode, uye yakasimba electrolyte (Li.1.3Al0.3Ti1.7(PO4)3, kana LATP). Iyi gadziriso inobvumira inoshanda lithium ion kutakura uku ichideredza kusingadiwe makemikari kusangana. Kuburikidza nekuyedzwa, bhatiri reLi-H rakaratidza simba retioretical density ye2825 Wh/kg, richichengetedza mhepo yakatsiga inotenderera 3V. Pamusoro pezvo, yakawana hukasha hwekutenderera-rwendo rwekutenderera (RTE) ye99.7%, ichiratidza kushomeka kwesimba panguva yekuchaja uye kuburitsa mavhiri, uku ichichengetedza kugadzikana kwenguva refu.
Kuti uwedzere kuvandudza kudhura, kuchengetedza uye nyore kugadzira, timu yakagadzira anode-isina Li-H bhatiri inobvisa kudiwa kwe pre-yakaiswa lithium simbi. Panzvimbo iyoyo, bhatiri rinoisa lithium kubva ku lithium munyu (LiH2PO4uye LiOH) mu electrolyte panguva yekuchaja. Iyo vhezheni inochengeta zvakanakira iyo yakajairwa Li-H bhatiri uku ichiunza mamwe mabhenefiti. Inogonesa inobudirira lithium plating uye kubvisa neCoulombic kunyatsoshanda (CE) ye98.5%. Uyezve, inoshanda zvakadzikama kunyangwe pakadzika hydrogen concentrations, ichideredza kuvimba nepamusoro-kudzvanywa H₂ kuchengetedza. Computational modelling, senge Density Functional Theory (DFT) simulations, zvakaitwa kuti unzwisise kuti lithium nehydrogen ions zvinofamba sei mukati mebhatiri's electrolyte.
Kubudirira uku muLi-H bhatiri tekinoroji inopa mikana mitsva yemhando yepamusoro yekuchengetera magetsi mhinduro, ine zvingangoita zvikumbiro zvinotora renewable simba magidhi, mota dzemagetsi, uye kunyangwe tekinoroji yemuchadenga. Kana ichienzaniswa neyakajairwa nickel-hydrogen mabhatiri, iyo Li-H sisitimu inopa yakawedzera simba density uye kushanda zvakanaka, zvichiita kuti ive mumiriri akasimba wechizvarwa chinotevera chekuchengetedza magetsi. Iyo anode-yemahara vhezheni inoisa hwaro hwekuwedzera-inodhura uye scalable hydrogen-based mabhatiri.
Pepa Link:https://doi.org/10.1002/ange.202419663
(Yakanyorwa naZHENG Zihong, Yakagadziriswa naWU Yuyang)
Nguva yekutumira: Mar-12-2025