Ua hoʻolauna kekahi hui noiʻi i alakaʻi ʻia e Prof. CHEN Wei ma ke Kulanui o ʻEpekema a me ʻenehana o Kina (USTC) i kahi ʻōnaehana pākahi kemika hou e hoʻohana ana i ke kinoea hydrogen e like me ka anode. Ua paʻi ʻia ka haʻawina ma kaʻO Angewandte Chemie International Edition.
H2) ua loaʻa ka manaʻo ma ke ʻano he mea lawe ikehu hoʻohou kūpaʻa a me ke kumu kūʻai ma muli o kāna mau waiwai electrochemical maikaʻi. Eia nō naʻe, hoʻohana mua nā pākaukau hydrogen-based i ka H2ma ke ʻano he cathode, ka mea e hoʻopaʻa ai i ko lākou kaha uila i ka 0.8–1.4 V a e kaupalena i ko lākou hiki ke mālama i ka ikehu. No ka lanakila ʻana i ka palena, ua noi ka hui noiʻi i kahi ala hou: me ka hoʻohana ʻana iā H2e like me ka anode e hoʻonui nui ai i ka ikehu a me ka volta hana. Ke hui pū ʻia me ka metala lithium ma ke ʻano he anode, ua hōʻike ka pākaukau i ka hana electrochemical kūikawā.
Hoʻolālā o ka pākaukau Li−H. (Kiʻi na USTC)
Ua hoʻolālā ka poʻe noiʻi i kahi ʻōnaehana pākahi Li-H prototype, e hoʻopili ana i kahi anode metala lithium, kahi papa diffusion gas i uhi ʻia i ka platinum e lawelawe ana ma ke ʻano he hydrogen cathode, a me kahi electrolyte paʻa (Li.1.3Al0.3Ti1.7(PO4)3, a i ʻole LATP). Hāʻawi kēia hoʻonohonoho i ka lawe ʻana i ka lithium ion i ka wā e hōʻemi ana i nā pilina kemika makemake ʻole. Ma o ka hoʻāʻo ʻana, ua hōʻike ka pākaukau Li-H i ka mana o ka ikehu theoretical o 2825 Wh/kg, me ka mālama ʻana i ka uila paʻa ma kahi o 3V. Hoʻohui ʻia, ua loaʻa iā ia ka maikaʻi o ka huakaʻi holo kaʻa (RTE) o 99.7%, e hōʻike ana i ka liʻiliʻi o ka nalowale o ka ikehu i ka wā o ka hoʻouka ʻana a me ka hoʻokuʻu ʻana, ʻoiai e mālama ana i ka paʻa lōʻihi.
No ka hoʻomaikaʻi hou ʻana i ke kumukūʻai, palekana a me ka maʻalahi o ka hana ʻana, ua hoʻomohala ka hui i kahi pākahi Li-H anode-free e hoʻopau i ka pono o ka metala lithium i hoʻokomo mua ʻia. Akā, waiho ka pākaukau i ka lithium mai nā paʻakai lithium (LiH2PO4a me LiOH) i ka electrolyte i ka wā e hoʻouka ai. Mālama ka mana i nā pono o ka pākaukau Li-H maʻamau me ka hoʻolauna ʻana i nā pono hou aʻe. Hiki iā ia ke hoʻopili pono i ka lithium a me ka wehe ʻana me ka Coulombic efficiency (CE) o 98.5%. Eia kekahi, hana paʻa ʻo ia ma nā haʻahaʻa hydrogen haʻahaʻa, e hōʻemi ana i ka hilinaʻi ʻana i ka waiho ʻana o ka H₂ kiʻekiʻe. Hana ʻia ka hoʻohālikelike ʻana, e like me Density Functional Theory (DFT), no ka hoʻomaopopo ʻana i ka neʻe ʻana o nā lithium a me nā ion hydrogen i loko o ka electrolyte o ka pākaukau.
Hāʻawi kēia holomua i ka ʻenehana pākaukau Li-H i nā manawa hou no nā ʻōnaehana mālama ikehu kiʻekiʻe, me nā noi kūpono e pili ana i nā grids ikehu hou, nā kaʻa uila, a me ka ʻenehana aerospace. Ke hoʻohālikelike ʻia me nā pākini nickel-hydrogen maʻamau, hāʻawi ka ʻōnaehana Li-H i ka hoʻonui ʻana i ka ikehu a me ka pono, e lilo ia i moho ikaika no ka mālama ʻana i ka mana o ka hanauna e hiki mai ana. Hoʻokumu ka mana anode-noa i ke kumu no nā pākaukau hydrogen-based ʻoi aku ke kumu kūʻai a hiki ke hoʻonui ʻia.
Loulou Pepa:https://doi.org/10.1002/ange.202419663
(Kākau ʻia e ZHENG Zihong, Hoʻoponopono ʻia e WU Yuyang)
Ka manawa hoʻouna: Mar-12-2025