当前位置:
X-MOL 学术
›
ACS Appl. Mater. Interfaces
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Realization of a High-Voltage and High-Rate Nickel-Rich NCM Cathode Material for LIBs by Co and Ti Dual Modification
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-04-13 , DOI: 10.1021/acsami.1c03195
Xiaoyu Zhang 1 , Yuegang Qiu 1 , Fangyuan Cheng 1 , Peng Wei 1 , Yuyu Li 1 , Yi Liu 1 , Shixiong Sun 1 , Yue Xu 1 , Qing Li 1 , Chun Fang 1 , Jiantao Han 1 , Yunhui Huang 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-04-13 , DOI: 10.1021/acsami.1c03195
Xiaoyu Zhang 1 , Yuegang Qiu 1 , Fangyuan Cheng 1 , Peng Wei 1 , Yuyu Li 1 , Yi Liu 1 , Shixiong Sun 1 , Yue Xu 1 , Qing Li 1 , Chun Fang 1 , Jiantao Han 1 , Yunhui Huang 1
Affiliation
![]() |
Nickel-rich Li(NixCoyMn1–x–yO2) (x ≥ 0.6) is considered to be a predominant cathode for next-generation lithium-ion batteries (LIBs) due to its towering specific energy density. Unfortunately, serious structural degradation causes rapid capacity degradation with the increase in nickel content. Herein, a Co and Ti co-modified LiNi0.8Co0.1Mn0.1O2 (NCM-811) cathode ameliorates the reversible capacity together with the rate capability by obviously alleviating the lattice structure degradation and microscopic intergranular cracks. Further studies show that the titanium doping effectively reduces the cation mixing and also stabilizes the crystal structure, while the spinel phase formed at the surface by a cobalt oxide coating is much stable than the layered phase at high voltage, which can alleviate the generation of micro-cracks. After 0.5% Co oxide coating and 1% Ti doping (T1Co0.5-NCM), a superior rate capability (121.75 mA h g–1 at 20 C between 2.7 and 4.5 V) and predominant capacity retention (74.2%) are observed compared with the pristine NCM-811 (59.5%) after 400 cycles between 2.7 and 4.7 V. This work supplies an eminent design of high-voltage and high-rate layered cathode materials and has a huge application prospect in the next generation of high-energy LIBs.
中文翻译:
通过钴和钛双重改性实现用于锂离子电池的高压高速率富镍NCM阴极材料
富镍了Li(Ni X钴ý锰1- X - Ÿ Ô 2)(X ≥0.6)被认为是用于下一代的锂离子电池(LIBS)一个主要的阴极,由于其特定的高耸的能量密度。不幸的是,随着镍含量的增加,严重的结构退化会导致容量快速下降。此处,Co和Ti共改性的LiNi 0.8 Co 0.1 Mn 0.1 O 2(NCM-811)阴极通过明显缓解晶格结构退化和微观晶间裂纹,改善了可逆容量和倍率容量。进一步的研究表明,钛掺杂有效地减少了阳离子的混合并稳定了晶体结构,而在高压下,由氧化钴涂层在表面形成的尖晶石相比层状相稳定得多,这可以减轻微晶的产生。 -裂纹。经过0.5%的Co氧化物涂层和1%的Ti掺杂(T1Co0.5-NCM)之后,超高的倍率能力(121.75 mA hg –1 在2.7至4.7 V之间经过400次循环后,与原始NCM-811(59.5%)相比,在20 C时(2.7至4.5 V)之间观察到了主要的容量保持率(74.2%)。高倍率阴极材料,在下一代高能LIB中具有广阔的应用前景。
更新日期:2021-04-21
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
通过钴和钛双重改性实现用于锂离子电池的高压高速率富镍NCM阴极材料
富镍了Li(Ni X钴ý锰1- X - Ÿ Ô 2)(X ≥0.6)被认为是用于下一代的锂离子电池(LIBS)一个主要的阴极,由于其特定的高耸的能量密度。不幸的是,随着镍含量的增加,严重的结构退化会导致容量快速下降。此处,Co和Ti共改性的LiNi 0.8 Co 0.1 Mn 0.1 O 2(NCM-811)阴极通过明显缓解晶格结构退化和微观晶间裂纹,改善了可逆容量和倍率容量。进一步的研究表明,钛掺杂有效地减少了阳离子的混合并稳定了晶体结构,而在高压下,由氧化钴涂层在表面形成的尖晶石相比层状相稳定得多,这可以减轻微晶的产生。 -裂纹。经过0.5%的Co氧化物涂层和1%的Ti掺杂(T1Co0.5-NCM)之后,超高的倍率能力(121.75 mA hg –1 在2.7至4.7 V之间经过400次循环后,与原始NCM-811(59.5%)相比,在20 C时(2.7至4.5 V)之间观察到了主要的容量保持率(74.2%)。高倍率阴极材料,在下一代高能LIB中具有广阔的应用前景。