Hoʻohana mākou i nā kuki e hoʻomaikaʻi i kou ʻike.Ma ka hoʻomau ʻana i kēia pūnaewele, ʻae ʻoe i kā mākou hoʻohana ʻana i nā kuki.ʻIke hou aku.
Ke ulu nei ka ʻoihana kaʻa uila (EV), pēlā nō ka noiʻi ʻana a me ka hoʻomohala ʻana i nā pākaukau lithium-ion kiʻekiʻe e mana iā lākou.ʻO ka noiʻi a me ka hoʻonui ʻana i nā ʻenehana wikiwiki a me ka hoʻokuʻu ʻana, a me ka hoʻonui ʻana i ke ola pākaukau, ʻo ia nā hana koʻikoʻi i kona hoʻomohala ʻana.
ʻO kekahi mau mea, e like me nā hiʻohiʻona electrode-electrolyte interface, lithium ion diffusion, a me electrode porosity, hiki ke kōkua i ka lanakila ʻana i kēia mau pilikia a hoʻokō i ka hoʻopiʻi wikiwiki a me ke ola lōʻihi.
I loko o nā makahiki i hala iho nei, ua puka mai nā nanomaterials ʻelua-dimensional (2D) (nā hale pepa he mau nanometer mānoanoa) ma ke ʻano he mea anode kūpono no nā pākahi lithium-ion.Loaʻa i kēia mau nanosheets kahi kiʻekiʻe o ka pūnaewele ikaika a me ka ratio hiʻohiʻona kiʻekiʻe, e hāʻawi ana i ka hoʻouka wikiwiki a me nā hiʻohiʻona paikikala maikaʻi loa.
ʻO ka mea nui, nā nanomaterial ʻelua-dimensional e pili ana i ka transition metal diborides (TDM) i huki i ka manaʻo o ke kaiāulu ʻepekema.Mahalo i nā mokulele honeycomb o nā ʻātoma boron a me nā metala hoʻololi multivalent, hōʻike nā TMDs i ka wikiwiki kiʻekiʻe a me ka paʻa lōʻihi o nā pōʻai mālama ion lithium.
I kēia manawa, ke hana nei kahi hui noiʻi i alakaʻi ʻia e Prof. Noriyoshi Matsumi o ka Japan Advanced Institute of Science and Technology (JAIST) a me Prof. Kabir Jasuja o ka Indian Institute of Technology (IIT) Gandhinagar e ʻimi hou i ka hiki ke mālama ʻia ʻo TMD.
Ua alakaʻi ka hui i ka noiʻi hoʻokele mua ma ka mālama ʻana i nā titanium diboride (TiB2) hierarchical nanosheets (THNS) ma ke ʻano he mea anode no nā pā lithium-ion.ʻO ka hui pū kekahi ʻo Rajashekar Badam, ʻo JAIST Senior Lecturer, Koichi Higashimin, JAIST Technical Expert, Akash Varma, mua JAIST haumāna puka, a me Kauka Asha Lisa James, IIT Gandhinagar haumāna.
Ua paʻi ʻia nā kikoʻī o kā lākou noiʻi ma ACS Applied Nano Materials a e loaʻa iā ia ma ka pūnaewele ma Kepakemapa 19, 2022.
Ua loaʻa iā TGNS ma o ka hoʻonā ʻana o ka pauka TiB2 me ka hydrogen peroxide a ukali ʻia e ka centrifugation a me ka lyophilization o ka hopena.
ʻO ka mea e kū ai kā mākou hana ʻo ia ka scalability o nā ʻano hana i kūkulu ʻia e synthesize i kēia mau nanosheets TiB2.No ka hoʻohuli ʻana i kekahi nanomaterial i ʻenehana tangible, ʻo ka scalability ka mea palena.ʻO kā mākou ʻano hana synthetic e koi wale i ka agitation a ʻaʻole pono i nā mea hana maʻalahi.ʻO kēia ma muli o ka hoʻoheheʻe ʻana a me ka hana recrystallization o TiB2, kahi mea i ʻike ʻole ʻia e hana i kēia hana i alahaka hoʻohiki mai ka lab a i ke kula.
Ma hope mai, ua hoʻolālā ka poʻe noiʻi i ka hapalua cell lithium-ion anode e hoʻohana ana i ka THNS ma ke ʻano he anode active material a ua noiʻi i nā waiwai mālama mālama o ka anode THNS-based.
Ua aʻo nā mea noiʻi ʻo ka anode THNS-based he kiʻekiʻe ka hoʻokuʻu ʻana o 380 mAh / g i ka nui o kēia manawa o 0.025 A / g wale nō.Eia kekahi, ua nānā lākou i ka mana hoʻokuʻu o 174mAh / g ma kahi kiʻekiʻe o kēia manawa o 1A / g, kahi paʻa o 89.7%, a me kahi manawa uku o 10 mau minuke ma hope o 1000 cycles.
Eia hou, hiki i ka THNS-based lithium-ion anodes ke kū i nā au kiʻekiʻe loa, mai kahi o 15 a 20 A / g, e hāʻawi ana i ka hoʻopiʻi ultra-fast ma kahi o 9-14 kekona.I ke au kiʻekiʻe, ʻoi aku ka nui o ka paʻa ʻana ma mua o 80% ma hope o 10,000 cycles.
Hōʻike nā hopena o kēia haʻawina he mau moho kūpono nā nanosheets 2D TiB2 no ka hoʻopaʻa wikiwiki ʻana i nā pā lithium-ion ola lōʻihi.Hōʻike pū lākou i nā pono o nā mea nui nanoscale e like me TiB2 no nā waiwai maikaʻi me ka hiki ke kiʻekiʻe kiʻekiʻe kiʻekiʻe, pseudocapacitive charge storage a me ka hana paikikala maikaʻi loa.
Hiki i kēia ʻenehana hoʻopiʻi wikiwiki ke hoʻolalelale i ka hoʻolaha ʻana o nā kaʻa uila a hoʻemi nui i ka manawa kali no ka hoʻopiʻi ʻana i nā mea uila uila.Manaʻo mākou e hoʻoulu hou kā mākou mau hopena i ka noiʻi hou ʻana ma kēia wahi, hiki i ka hopena ke lawe mai i ka ʻoluʻolu i nā mea hoʻohana EV, e hōʻemi i ka haumia ea o ke kūlanakauhale, a e hoʻohaʻahaʻa i ke koʻikoʻi e pili ana i ke ola kelepona, a laila e hoʻonui ai i ka huahana o ko mākou kaiāulu.
Manaʻo ka hui e hoʻohana koke ʻia kēia ʻenehana kupaianaha i nā kaʻa uila a me nā mea uila ʻē aʻe.
Varma, A., et al.(2022) Nā nanosheets hierarchical e pili ana i ka titanium diboride e like me nā mea anode no nā pā lithium-ion.Hoʻohana ʻia nā nanomaterials ACS.doi.org/10.1021/acsanm.2c03054.
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