Plasma-Induced Amorphous Shell and Deep Cation-Site S Doping Endow TiO2 with Extraordinary Sodium Storage Performance

Hanna He; Dan Huang; Weikong Pang; Dan Sun; Qi Wang; Yougen Tang; Xiaobo Ji; Zaiping Guo; Haiyan Wang

doi:10.1002/adma.201801013

Plasma-Induced Amorphous Shell and Deep Cation-Site S Doping Endow TiO₂ with Extraordinary Sodium Storage Performance

Hanna He
, Dan Huang
, Weikong Pang
, Dan Sun
, Qi Wang
, Yougen Tang^*
, Xiaobo Ji
, Zaiping Guo
, Haiyan Wang

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

210 Citations (Scopus)

Abstract

Structural design and modification are effective approaches to regulate the physicochemical properties of TiO2, which play an important role in achieving advanced materials. Herein, a plasma-assisted method is reported to synthesize a surface-defect-rich and deep-cation-site-rich S doped rutile TiO2 (R-TiO2– x-S) as an advanced anode for the Na ion battery. An amorphous shell (≈3 nm) is induced by the Ar/H2 plasma, which brings about the subsequent high S doping concentration (≈4.68 at%) and deep doping depth. Experimental results and density functional theory calculations demonstrate greatly facilitated ion diffusion, improved electronic conductivity, and an increased mobility rate of holes for R-TiO2− x-S, which result in superior rate capability (264.8 and 128.5 mAh g−1 at 50 and 10 000 mA g−1, respectively) and excellent cycling stability (almost 100% retention over 6500 cycles). Such improvements signify that plasma treatment offers an innovative and general approach toward designing advanced battery materials. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Original language	English
Article number	1801013
Journal	Advanced Materials
Volume	30
Issue number	26
DOIs	https://doi.org/10.1002/adma.201801013
Publication status	Published - 27 Jun 2018
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

This work was financially supported by the National Natural Science Foundation of China (Nos. 21671200, 21571189, and 61664003), the Hunan Provincial Science and Technology Plan Project (No. 2017TP1001), the Science and Technology Major Project of Hunan Province, China (2017GK1040), the Innovation-Driven Project of Central South University (No. 2016CXS009), and the Innovation-Driven Development Foundation of Guangxi Province (Grant No. AA17204063).

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Research Keywords

amorphous shell
deep cation-site S doping
rate performance
sodium ion battery
titanium dioxide

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Cite this

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title = "Plasma-Induced Amorphous Shell and Deep Cation-Site S Doping Endow TiO2 with Extraordinary Sodium Storage Performance",

abstract = "Structural design and modification are effective approaches to regulate the physicochemical properties of TiO2, which play an important role in achieving advanced materials. Herein, a plasma-assisted method is reported to synthesize a surface-defect-rich and deep-cation-site-rich S doped rutile TiO2 (R-TiO2– x-S) as an advanced anode for the Na ion battery. An amorphous shell (≈3 nm) is induced by the Ar/H2 plasma, which brings about the subsequent high S doping concentration (≈4.68 at\%) and deep doping depth. Experimental results and density functional theory calculations demonstrate greatly facilitated ion diffusion, improved electronic conductivity, and an increased mobility rate of holes for R-TiO2− x-S, which result in superior rate capability (264.8 and 128.5 mAh g−1 at 50 and 10 000 mA g−1, respectively) and excellent cycling stability (almost 100\% retention over 6500 cycles). Such improvements signify that plasma treatment offers an innovative and general approach toward designing advanced battery materials. {\textcopyright} 2018 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim",

keywords = "amorphous shell, deep cation-site S doping, rate performance, sodium ion battery, titanium dioxide",

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T1 - Plasma-Induced Amorphous Shell and Deep Cation-Site S Doping Endow TiO2 with Extraordinary Sodium Storage Performance

AU - He, Hanna

AU - Huang, Dan

AU - Pang, Weikong

AU - Sun, Dan

AU - Wang, Qi

AU - Tang, Yougen

AU - Ji, Xiaobo

AU - Guo, Zaiping

AU - Wang, Haiyan

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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N2 - Structural design and modification are effective approaches to regulate the physicochemical properties of TiO2, which play an important role in achieving advanced materials. Herein, a plasma-assisted method is reported to synthesize a surface-defect-rich and deep-cation-site-rich S doped rutile TiO2 (R-TiO2– x-S) as an advanced anode for the Na ion battery. An amorphous shell (≈3 nm) is induced by the Ar/H2 plasma, which brings about the subsequent high S doping concentration (≈4.68 at%) and deep doping depth. Experimental results and density functional theory calculations demonstrate greatly facilitated ion diffusion, improved electronic conductivity, and an increased mobility rate of holes for R-TiO2− x-S, which result in superior rate capability (264.8 and 128.5 mAh g−1 at 50 and 10 000 mA g−1, respectively) and excellent cycling stability (almost 100% retention over 6500 cycles). Such improvements signify that plasma treatment offers an innovative and general approach toward designing advanced battery materials. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

AB - Structural design and modification are effective approaches to regulate the physicochemical properties of TiO2, which play an important role in achieving advanced materials. Herein, a plasma-assisted method is reported to synthesize a surface-defect-rich and deep-cation-site-rich S doped rutile TiO2 (R-TiO2– x-S) as an advanced anode for the Na ion battery. An amorphous shell (≈3 nm) is induced by the Ar/H2 plasma, which brings about the subsequent high S doping concentration (≈4.68 at%) and deep doping depth. Experimental results and density functional theory calculations demonstrate greatly facilitated ion diffusion, improved electronic conductivity, and an increased mobility rate of holes for R-TiO2− x-S, which result in superior rate capability (264.8 and 128.5 mAh g−1 at 50 and 10 000 mA g−1, respectively) and excellent cycling stability (almost 100% retention over 6500 cycles). Such improvements signify that plasma treatment offers an innovative and general approach toward designing advanced battery materials. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

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KW - deep cation-site S doping

KW - rate performance

KW - sodium ion battery

KW - titanium dioxide

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