Ke lohi nei ke kaʻa uila? Hāʻawi ke Kulanui ʻo Cambridge i kahi ala lapaʻau hou

Awdur: Iflowpower - Proveedor de centrales eléctricas portátiles

Ke hoʻohālikelike ʻia i ka mileage ola pākaukau, hopohopo nui ka poʻe e pili ana i ka manawa e hoʻopaʻa ai i nā kaʻa uila, ʻoiai ʻo ka hapa nui o nā kaʻa uila i hoʻokuʻu ʻia i kēia mau makahiki i kākoʻo i ka 30-40 min fast charge (80% capacity), akā ʻaʻole hiki ke hoʻokō i nā manaʻo o ka poʻe. I kēia manawa, ʻo ka mana lithium ion pākahi i hoʻohana ʻia i loko o nā kaʻa uila ka nui o ka lithium ion pākahi, a ʻo ka palena wikiwiki o ka hoʻopiʻi ʻana o ka pā lithium ion i loko o kahi hōʻuluʻulu maikaʻi ʻole i ka electrode maikaʻi ʻole. I ka wā o ka hoʻouka ʻana, lawe ʻia ʻo Li + mai ka electrode maikaʻi, hoʻoheheʻe ʻia ka mea hoʻoheheʻe i ka electrolyte, a laila hoʻopuehu ʻia i ka ʻili o ka electrode maikaʻi ʻole, a hoʻopili ʻia ke ʻano aniani o ka graphite negative electrode ma hope o ka solvate.

I loko o ka hopena holoʻokoʻa, ʻo ka diffusion o ka solventification a me Li + i loko o nā ʻāpana graphite ka loulou kaohi o ka wikiwiki pane. Ke wikiwiki loa ka hoʻouka ʻana, ua hoʻohui ʻia ka polarization, a ua hoʻoheheʻe ʻia ka metala Li ma ka ʻili o ka graphite negative electrode. ʻO ke ʻano maʻamau o ka hoʻomaikaʻi ʻana i ka mea electrode maikaʻi ʻole he nanofed, hoʻomaikaʻi i ka wahi pili o ka mea ikaika a me ka electrolyte, e hōʻemi ana i ka mamao diffusion ma waena o Li + i ka mea ikaika, akā lawe pū kekahi i nā pilikia, e like me nanoforming Ua hoʻemi ʻia ka paʻa paʻa, a me nā hopena ʻaoʻao i hoʻokumu ʻia e ka ʻāpana kikoʻī kikoʻī.

ʻO Kentj.griffith (ka mea kākau mua) a me Clarep.grey o ke Kulanui o Cambridge, British Cambridge, e uhaki i nā palena o ka noʻonoʻo kuʻuna, e hoʻomaka ana mai ka hale aniani, ʻike ʻia inā hoʻohana ʻia ka Ni a me W metala oxides e kūkulu i kahi kūpono ʻekolu-dimensional crystal structure, hiki iā ia i nā microns High-magnification hiʻohiʻona ua ʻike ʻia ma ka nui o ka nui, a me ke kiʻekiʻe paʻa paʻa kiʻekiʻe.

I ka hoʻāʻo, hoʻohana ʻo Kentj.griffith i ka NB a me W&39;s oxide e synthesize i ka NB16W555 (e like me ka hōʻike ʻana ma Fig. AC) a me Nb18W16O93 (e like me ka mea i hōʻike ʻia ma ke Kiʻi DF i hōʻike ʻia ma ke Kiʻi DF), kahi ʻo Nb16W5O55 kahi ʻōnaehana crystalline pili hoʻokahi, a ua haku ʻia ke aniani me kahi kihi maʻamau.

, E hoʻokumu i kahi hui no kēlā me kēia 4x5 octahedral, e like me ka hōʻike ʻana ma ka Fig. A. ʻO ka mea NB18W16O93 kahi laina alkline orthogonal, a ua hōʻike ʻia ke ʻano ma ke Kiʻi D.

Hōʻike ʻia nā mea ʻelua i ke kiʻi ma lalo nei, a aia ʻekolu mau kaʻina hana ma waena o 2.5-1.0V, a ʻo ka paepae uila e pili ana i 1.

55V, a me ka uila anuu mea e pili ana i 1.55V, a me ka Li4TI5O12 mea (1.55 V) pili kokoke, akā, i ka reversible mana o ka NB16W5O55 mea i oi aku kiʻekiʻe ma mua o ka LTO mea, a hiki i 225 mAh / g ma ka C / 5 lākiō, a me ka NB16W5O55 mea hoʻonui i ka hana hoʻonui charging.

(12min wahaheʻe) hiki i ka 171 mAh / g, ʻoiai ma kahi kiʻekiʻe kiʻekiʻe o 20c (3min) a hiki i ka 148mAh / g. ʻAʻole wale ka mea NB16W5O55 i ka hana hoʻonui, a aia ka ikaika ikaika i ka hana pōʻai. Ma hope o 250 mau kaʻina o ka helu 10C, hiki i ka hiki ke hoʻololi i ka 95%, a laila ʻo ka 20C ka hoʻonui ʻana he 750 mau manawa, hiki ke hoʻohuli ʻia ka pākaukau.

Eia naʻe, eia ʻo Xiaobian e ʻōlelo i ka mea kākau ma ʻaneʻi, ʻo ia kahi ʻāpana liʻiliʻi, aia i ka ʻike ʻana i ka hana hoʻonui, a ua hoʻohui ʻia ke kaʻina hoʻouka uila mau i ka wā o ke kaʻina hana, a ʻo nā mea kākau i ka ʻike pōʻai e hāʻule i ke kaʻina hana hoʻouka uila mau. Hoʻomaopopo mākou a pau e pili ana ka hoʻouka ʻana i ke kaomi mau i ka hiki ke hoʻopiʻi ʻana i nā ʻenekini hou, ʻoi aku hoʻi i nā kumukūʻai kiʻekiʻe, he mea nui loa ia, no laila hiki i nā mea kākau ke maikaʻi loa, a hoʻoneʻe ʻia ka pōʻai i ka pōʻai e like me ka emi ʻana. Me he mea lā e makaʻala nā haole! Maikaʻi nō hoʻi ka ʻimi electrochemical o NB18W16O93, a ʻo kāna paepae uila he 1.

67V, ma C / 5 a me 1C manawa, no ka mea he nui ke kaumaha o ka mole Nb18W16O93, ʻo ka gram he 20 mAh / g haʻahaʻa ma mua o ka mea NB16W5O55, akā ʻoi aku ka nui Ma kahi kiʻekiʻe kiʻekiʻe, ʻoi aku ka maikaʻi o ka mea NB18W16O93 i ka hana, a hiki i ka hiki ke hoʻololi i ka 0 mAh a hiki i ka 150 mAh. 70 mAh / g ma 60C a me 100C hoʻonui, ʻoi aku ka maikaʻi mai ka mea NB16W5O55. ʻAʻole ʻae ʻia ka hana hoʻonui maikaʻi mai ka Li + diffusion coefficient kiʻekiʻe o nā mea ʻelua. Mai ka papa ma lalo nei, hiki ke ʻike i ka diffusion coefficient o nā mea ʻelua ma kahi o 10-12-10-13m2 / s, ʻoi aku ka kiʻekiʻe ma mua o ka Fast charging staminated titanate (10-16-10-15) Ua lawa loa ka manawa e hoʻopau ai i ka diffusion i loko o nā ʻāpana o 10um micrometer hiki ke hoʻokō i kēia mau mea. ka māmā holo.

ʻOiai ke hoʻohālikelike ʻia me nā mea graphite kuʻuna, ʻo ka NB16W55 a me ka NB18W16O93 ʻelua mau mea ʻaʻohe mea maikaʻi ma ka leo gram a me ka paepae voli, inā mākou e noʻonoʻo i ka density compaction, e ʻike mākou ʻelua mau mea ʻoi aku ka ʻoi aku ka nui o ka paʻa kiʻekiʻe kiʻekiʻe no laila loaʻa ka pōmaikaʻi nui loa (e like me ka hōʻike ʻana ma ke kiʻi ma lalo) i ka leo unit (i hōʻike ʻia ma lalo), ma ka 1C NB556 leo nui a hiki i ka nui o ka hiki NB556ah. L, a hiki i ka 20C magnification Hiki iā ia ke hōʻea i 350AH / L, a hiki i ka NB18W16O93 mea hiki ke hiki i 500ah / L ma 1C magnification, a hiki i ka 400ah / L ma 20C magnification, a ʻo ka nui o ka mana o ka mea graphite he 100ah / L / L wale nō ka hiki ʻole a hiki i ka 100AH. hoonui. ʻAʻole hiki i kēia ʻōlelo o ka NB16W5O55 a me NB18W16O93 ʻelua mau mea ke hoʻohālikelike i nā mea graphite kuʻuna ma ke kaumaha o ka ikehu kaumaha, akā i ka nui o ka ikehu nui, loaʻa iā ia nā pōmaikaʻi nui, ʻoi aku hoʻi i ka hoʻonui kiʻekiʻe, a ʻoi aku ka lanakila. ʻO Kentj.

Ua hoʻomohala ʻo Griffith i ka NB16W5O55 a me NB18W16O93 ʻelua mau mea i loaʻa i ka Li + diffusion coefficients kiʻekiʻe loa, i hiki ke hoʻokō ʻia ka hana hoʻonui maikaʻi ma ka nui micrometer, ʻoiai ʻaʻole maikaʻi kēia mau mea ʻelua e like me nā mea kuʻuna ma ke kaupaona i hoʻohālikelike ʻia me nā paepae uila. ʻO nā mea graphite, akā ʻo nā hiʻohiʻona o ke kiʻekiʻe kiʻekiʻe maoli ka mea i hōʻike ʻia i nā mea ʻelua i hōʻike ʻia i mea maikaʻi loa o ka mea graphite ma ka nui o ka ikehu, a he ākea ka manaʻo o ka mea i ka wā e hiki mai ana. ʻO ka mea e pono ai ke emi i ke kumukūʻai).

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