Sökning: onr:"swepub:oai:DiVA.org:uu-475116" >
Enhanced rate capab...
-
Jin, FengShanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China.
(författare)
Enhanced rate capability and high-voltage cycling stability of single-crystal nickel-rich cathode by surface anchoring dielectric BaTiO3
- Artikel/kapitelEngelska2022
Förlag, utgivningsår, omfång ...
-
Elsevier,2022
-
printrdacarrier
Nummerbeteckningar
-
LIBRIS-ID:oai:DiVA.org:uu-475116
-
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-475116URI
-
https://doi.org/10.1016/j.jcis.2022.03.064DOI
Kompletterande språkuppgifter
-
Språk:engelska
-
Sammanfattning på:engelska
Ingår i deldatabas
Klassifikation
-
Ämneskategori:ref swepub-contenttype
-
Ämneskategori:art swepub-publicationtype
Anmärkningar
-
The single-crystal Ni-rich Li(NixCoyMn1_x_y)O-2 cathode (NCM) demonstrates better cycle performance, enhanced tap density and improved mechanical structure stability, compared with polycrystalline NCM. However, limited Li+ transports, (003) plane slips and microcracks in large single particles hinder rate capability and cycle performance. To overcome these shortcomings, single-crystal NCM cathodes have been modified by nanosized tetragonal BaTiO3. Due to the dielectric properties, BaTiO(3 )particles induce electric field concentration at the BaTiO3-NCM-electrolyte interface. Thus, a large amount of lithium vacancies can be formed, providing sufficient sites for the hopping diffusion of lithium ions, thereby significantly enhancing the diffusion coefficient of Li+. Moreover, the redistribution of charges can inhibit the formation and accumulation of cathode-electrolyte-interface. Owing to the synergetic effect of BaTiO3, the BT-modified single-crystal NCM with the optimized loading shows a remarkable initial discharge capacity of 138.5 mAh g(_1) and maintains 53.8% of its initial discharge capacity after 100 cycles under 5C at 4.5 V cut-off voltage. Overall, the proposed dielectric cathode-electrolyte-interface strategy can enhance Li+ ion transport and stabilize the interface structure, leading to improved rate performance. Meanwhile, the diffusion-induced state of charge gradient can also be inhibited, resulting in high structure stability of single-crystal NCMs under high rate and cut-off voltage cycling. (C) 2022 Elsevier Inc. All rights reserved.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
-
Xue, XiaoyinShanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China.
(författare)
-
Zhao, YinShanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China.
(författare)
-
Shi, LiyiShanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China.;Shanghai Univ, Emerging Ind Inst, Jiaxing 314006, Zhejiang, Peoples R China.
(författare)
-
Wang, ZhuyiShanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China.
(författare)
-
Zhang, MeihongShanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China.
(författare)
-
Wang, YiShanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China.
(författare)
-
Zhu, JiefangUppsala universitet,Strukturkemi(Swepub:uu)zhuji179
(författare)
-
Yuan, ShuaiShanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China.
(författare)
-
Shanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China.Shanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China.;Shanghai Univ, Emerging Ind Inst, Jiaxing 314006, Zhejiang, Peoples R China.
(creator_code:org_t)
Sammanhörande titlar
-
Ingår i:Journal of Colloid and Interface Science: Elsevier619, s. 65-740021-97971095-7103
Internetlänk
Hitta via bibliotek
Till lärosätets databas