Constructing porous TiO(2)crystals by an etching process for long-life lithium ion batteries

doi:10.1039/d0nr04861e

SIC OpenIR

	Constructing porous TiO(2)crystals by an etching process for long-life lithium ion batteries
	Nong, SY; Dong, CL; Wang, YX; Huang, FQ
	2020-09-21
Source Publication	NANOSCALE
ISSN	2040-3364
Issue	35 Pages:18429
Subtype	Article
Abstract	Zero strain materials, which have no volume change when charging and discharging, show ultra-long cycling stabilities when used as lithium-ion battery anodes, making them an area of extreme interest in this decade. For a typical anatase TiO(2)crystal, the volume change is 3-4% during Li insertion/extraction, which is not "zero strain". As the Ti/O packing in the TiO(2)lattice is too tight, there is insufficient void space for Li insertion, leading to volume expansion and structural collapse. Herein, pseudo-"zero-strain" TiO(2)is achievedviadesigning TiO(2)crystals with abundant inner mesopores, making Ti/O loose-packedviathe acid-etching of K2Ti8O17, providing sufficient space for Li intercalation. Instead of the traditional cut-off potential of 1 V used for Ti-/Nb-based anodes, we choose 0.01 V as the cut-off to make the best of the extra capacity contributed by the mesopores. As expected, plenty of mesopores could serve as "Li+-reservoirs" for fast lithium storage, demonstrating exceptional high-rate performance with an average capacity of 109.6 mA h g(-1)after 30 000 cycles at 60 C and 100 mA h g(-1)at 120 C. Such a strategy of combining a mesoporous structure and cut-off potential regulation may pave a solid pathway for constructing novel high-power anodes.
DOI	10.1039/d0nr04861e
WOS Keyword	ANODE MATERIALS ; HOLLOW SPHERES ; ANATASE TIO2 ; RUTILE TIO2 ; PERFORMANCE ; COMPOSITE ; STORAGE ; NANOMATERIALS ; STRATEGY ; IMPACT
Language	英语
WOS Research Area	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
Publisher	ROYAL SOC CHEMISTRY
Citation statistics
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/27741
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Nong, SY,Dong, CL,Wang, YX,et al. Constructing porous TiO(2)crystals by an etching process for long-life lithium ion batteries[J]. NANOSCALE,2020(35):18429.
APA	Nong, SY,Dong, CL,Wang, YX,&Huang, FQ.(2020).Constructing porous TiO(2)crystals by an etching process for long-life lithium ion batteries.NANOSCALE(35),18429.
MLA	Nong, SY,et al."Constructing porous TiO(2)crystals by an etching process for long-life lithium ion batteries".NANOSCALE .35(2020):18429.

Files in This Item:
There are no files associated with this item.

If you have any objections to this item, please fill out the form below and the administrator will contact you as soon as possible.
Content:
Email：	*
Institution:
Verification Code:	Refresh

Any comments and suggestions are welcomed.
Title:	*
Content:
Email：	*
Verification Code:	Refresh

中国科学院上海硅酸盐研究所机构知识库