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Title: Titanium Disulfide Coated Carbon Nanotube Hybrid Electrodes Enable High Energy Density Symmetric Pseudocapacitors

Abstract

While electrochemical supercapacitors often show high power density and long operation lifetimes, they are plagued by limited energy density. Pseudocapacitive materials, in contrast, operate by fast surface redox reactions and are shown to enhance energy storage of supercapacitors. Furthermore, several reported systems exhibit high capacitance but restricted electrochemical voltage windows, usually no more than 1 V in aqueous electrolytes. Here, it is demonstrated that vertically aligned carbon nanotubes (VACNTs) with uniformly coated, pseudocapacitive titanium disulfide (TiS 2) composite electrodes can extend the stable working range to over 3 V to achieve a high capacitance of 195 F g -1 in an Li-rich electrolyte. A symmetric cell demonstrates an energy density of 60.9 Wh kg -1—the highest among symmetric pseudocapacitors using metal oxides, conducting polymers, 2D transition metal carbides (MXene), and other transition metal dichalcogenides. Nanostructures prepared by an atomic layer deposition/sulfurization process facilitate ion transportation and surface reactions to result in a high power density of 1250 W kg -1 with stable operation over 10 000 cycles. In conclusion, a flexible solid-state supercapacitor prepared by transferring the TiS 2–VACNT composite film onto Kapton tape is demonstrated to power a 2.2 V light emitting diode (LED) for 1 min.

Authors:
 [1];  [1];  [1];  [2];  [3];  [4];  [1];  [1];  [5];  [5];  [6];  [3];  [1]
  1. Berkeley Sensor and Actuator Center, Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  2. Univ. of Utah, Salt Lake City, UT (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. San Francisco State Univ., San Francisco, CA (United States)
  5. Univ. of California, Berkeley, CA (United States)
  6. U.S. Army RDECOM AMRDEC, Redstone Arsenal, AL (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division
OSTI Identifier:
1465431
Alternate Identifier(s):
OSTI ID: 1412611
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Advanced Materials
Additional Journal Information:
Journal Volume: 30; Journal Issue: 5; Related Information: © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim; Journal ID: ISSN 0935-9648
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; atomic layer deposition (ALD); high energy density storage; titanium sulfides; transition metal dichalcogenides (TMDC); vertically aligned carbon nanotubes (VACNTs)

Citation Formats

Zang, Xining, Shen, Caiwei, Kao, Emmeline, Warren, Roseanne, Zhang, Ruopeng, Teh, Kwok Siong, Zhong, Junwen, Wei, Minsong, Li, Buxuan, Chu, Yao, Sanghadasa, Mohan, Schwartzberg, Adam, and Lin, Liwei. Titanium Disulfide Coated Carbon Nanotube Hybrid Electrodes Enable High Energy Density Symmetric Pseudocapacitors. United States: N. p., 2017. Web. doi:10.1002/adma.201704754.
Zang, Xining, Shen, Caiwei, Kao, Emmeline, Warren, Roseanne, Zhang, Ruopeng, Teh, Kwok Siong, Zhong, Junwen, Wei, Minsong, Li, Buxuan, Chu, Yao, Sanghadasa, Mohan, Schwartzberg, Adam, & Lin, Liwei. Titanium Disulfide Coated Carbon Nanotube Hybrid Electrodes Enable High Energy Density Symmetric Pseudocapacitors. United States. doi:10.1002/adma.201704754.
Zang, Xining, Shen, Caiwei, Kao, Emmeline, Warren, Roseanne, Zhang, Ruopeng, Teh, Kwok Siong, Zhong, Junwen, Wei, Minsong, Li, Buxuan, Chu, Yao, Sanghadasa, Mohan, Schwartzberg, Adam, and Lin, Liwei. Mon . "Titanium Disulfide Coated Carbon Nanotube Hybrid Electrodes Enable High Energy Density Symmetric Pseudocapacitors". United States. doi:10.1002/adma.201704754. https://www.osti.gov/servlets/purl/1465431.
@article{osti_1465431,
title = {Titanium Disulfide Coated Carbon Nanotube Hybrid Electrodes Enable High Energy Density Symmetric Pseudocapacitors},
author = {Zang, Xining and Shen, Caiwei and Kao, Emmeline and Warren, Roseanne and Zhang, Ruopeng and Teh, Kwok Siong and Zhong, Junwen and Wei, Minsong and Li, Buxuan and Chu, Yao and Sanghadasa, Mohan and Schwartzberg, Adam and Lin, Liwei},
abstractNote = {While electrochemical supercapacitors often show high power density and long operation lifetimes, they are plagued by limited energy density. Pseudocapacitive materials, in contrast, operate by fast surface redox reactions and are shown to enhance energy storage of supercapacitors. Furthermore, several reported systems exhibit high capacitance but restricted electrochemical voltage windows, usually no more than 1 V in aqueous electrolytes. Here, it is demonstrated that vertically aligned carbon nanotubes (VACNTs) with uniformly coated, pseudocapacitive titanium disulfide (TiS2) composite electrodes can extend the stable working range to over 3 V to achieve a high capacitance of 195 F g-1 in an Li-rich electrolyte. A symmetric cell demonstrates an energy density of 60.9 Wh kg-1—the highest among symmetric pseudocapacitors using metal oxides, conducting polymers, 2D transition metal carbides (MXene), and other transition metal dichalcogenides. Nanostructures prepared by an atomic layer deposition/sulfurization process facilitate ion transportation and surface reactions to result in a high power density of 1250 W kg-1 with stable operation over 10 000 cycles. In conclusion, a flexible solid-state supercapacitor prepared by transferring the TiS2–VACNT composite film onto Kapton tape is demonstrated to power a 2.2 V light emitting diode (LED) for 1 min.},
doi = {10.1002/adma.201704754},
journal = {Advanced Materials},
issn = {0935-9648},
number = 5,
volume = 30,
place = {United States},
year = {2017},
month = {12}
}

Journal Article:
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Cited by: 9 works
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Figures / Tables:

Figure 1 Figure 1: TiS2-VACNT hybrid fabrication process and advantage as Pseudocapacitor electrodes. (a) TiS2-VACNT composite electrodes synthesized by a two-step process: TiN is coated onto VACNT by atomic layer deposition and converted to TiS2 composite in a sulfur vapor environment. The high capacitance energy storage in Li+ electrolyte is achieved bymore » electron-double-layer and TiS2 composite-Li intercalation. (b) Ragone plot for state-of-the-art energy storage systems showing TiS2- VACNT composite with the highest energy density among various families of non-carbon materials, including metal oxides, metal chalcogenides, and metal carbide-based system. (c) Long term cyclability of the TiS2-VACNT composite electrode in the 21 m LiTFSI electrolyte.« less

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.