E hoʻoholo i nā wahi ʻeha pākaukau lithium-ion me ka lipine: hōʻemi i ke ola pākaukau hoʻonui dendritic

Forfatter: Iflowpower – Fournisseur de centrales électriques portables

Hoʻokumu ʻia ka hui noiʻi ʻepekema o Les University ma ka lipine, i hui pū ʻia me kekahi ʻenehana laser kiʻekiʻe, a ua hoʻomohala i kahi ʻano mea electrode hou. Hiki i kēia mea ke lanakila i nā pilikia lōʻihi o ka pākaukau lithium-ion o kēia manawa a manaʻo e hoʻonui i ka hana o ka pā. ʻO ka pilahi metala Lithium e pili ana i kahi pākaukau i hoʻohana mau ʻia e like me ka graphite i hoʻohana ʻia ma ke ʻano he anode (ʻelua electrodes) i ka pilahi lithium metala maʻemaʻe.

No ka mea he kiʻekiʻe ka ikehu kiʻekiʻe o kēia mea, hiki i ka lithium metala ke hoʻonui i ka wikiwiki o ka hoʻouka ʻana o ka pākaukau, a hiki i ka hiki ke hiki i 10 mau manawa. Eia nō naʻe, aia kekahi mau hemahema i nā pā lithium-ion, ʻoi aku ka paʻakikī o nā "dendrites". I ka wā o ka hoʻouka ʻana, hoʻokumu ʻia kēia mau dendrites ma ka ʻili o ka anode a hiki ke hopena i ka pōkole pōkole, hāʻule ʻole a i ʻole ke ahi, no laila ua nui ka nui o nā haʻawina pākahi.

He holomua hou ko ka hui noiʻi ʻepekema mai ke Kulanui o Les ma kēia kahua, ʻo ka lipine mua. Hāʻawi ka hui i ka lipine i ka mea hōʻiliʻili keleawe i kēia manawa e hoʻokumu ana i ka anode lithium a mālama ʻia me ka laser e wela ai i ka wela wela o 2300 Kelvin (3680 ¡ã F a i ʻole 2026 ¡ã C), a laila e hāʻawi i kahi hiʻohiʻona hou loa. Hoʻololi kēia kaʻina i ka lipine i uhi porous, he mea nui ia mai ke silika, oxygen, a me kahi liʻiliʻi o ka graphene mea kilokilo.

Hōʻike nā hoʻokolohua mua ma ke kiʻiʻoniʻoni e hiki ke hoʻohana ʻia ma ke ʻano he pale pale o nā hui hōʻiliʻili o kēia manawa, hiki ke hoʻomoʻa a hoʻokuʻu i ka lithium metala, a ʻaʻole e ʻae i nā dendrites ʻino. I loko o kāna uhi pale silicon oxide i hoʻokomo ʻia i ka laser, ua loaʻa paha i ka hui Less University kahi ala e hoʻohana pono ai i kēia mau mea maikaʻi, ʻaʻole i hoʻonui hou ʻia ke kaumaha lithium. Hōʻike kāna mau hoʻokolohua e hōʻike ana ka pākaukau me kona uhi hou i ʻekolu mau manawa o ke ola o nā pahu lithium-ion metala ʻē aʻe "zero excess", a mālama ʻia he 70% mana i 60 mau kaʻina hana.

Ua hōʻike ka hui i ka wikiwiki a me ka palekana o kēia ʻenehana, ʻaʻole i komo i ka solvent, a hiki ke lawe ʻia ma ka lumi wela. No laila, manaʻolana nui ʻia, manaʻo e hiki ke hoʻonui i ka pālākiō.