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

Journal Article · · Advanced Materials
 [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)

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. 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.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
AC02-05CH11231; DE‐AC02‐05CH11231
OSTI ID:
1465431
Alternate ID(s):
OSTI ID: 1412611
Journal Information:
Advanced Materials, Vol. 30, Issue 5; Related Information: © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim; ISSN 0935-9648
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 68 works
Citation information provided by
Web of Science

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Cited By (17)

Metallo‐Hydrogel‐Assisted Synthesis and Direct Writing of Transition Metal Dichalcogenides journal May 2019
Engineering 2D Architectures toward High-Performance Micro-Supercapacitors journal August 2018
A Highly Stretchable Microsupercapacitor Using Laser‐Induced Graphene/NiO/Co 3 O 4 Electrodes on a Biodegradable Waterborne Polyurethane Substrate journal December 2019
Sandwich‐Like Ultrathin TiS 2 Nanosheets Confined within N, S Codoped Porous Carbon as an Effective Polysulfide Promoter in Lithium‐Sulfur Batteries journal July 2019
Electrochemical Double‐Layer Capacitor Energized by Adding an Ambipolar Organic Redox Radical into the Electrolyte journal July 2018
Electrochemical Double‐Layer Capacitor Energized by Adding an Ambipolar Organic Redox Radical into the Electrolyte journal July 2018
High‐Voltage Supercapacitors Based on Aqueous Electrolytes journal November 2018
Aqueous Symmetric Supercapacitors with Carbon Nanorod Electrodes and Water-in-Salt Electrolyte journal November 2018
Experimental and Theoretical Investigation of the Effect of Oxygen Vacancies on the Electronic Structure and Pseudocapacitance of MnO 2 journal July 2019
Nanostructured Anode Materials for Non-aqueous Lithium Ion Hybrid Capacitors journal June 2018
Solvent exfoliation stabilizes TiS 2 nanosheets against oxidation, facilitating lithium storage applications journal January 2019
Rational design of coralloid Co 9 S 8 –CuS hierarchical architectures for quantum dot-sensitized solar cells journal January 2018
Recent advances in exfoliation techniques of layered and non-layered materials for energy conversion and storage journal January 2019
A moisture absorbing gel electrolyte enables aqueous and flexible supercapacitors operating at high temperatures journal January 2019
Multimodal spectromicroscopy of monolayer WS 2 enabled by ultra-clean van der Waals epitaxy journal July 2018
Atomic-level structure engineering of metal oxides for high-rate oxygen intercalation pseudocapacitance journal October 2018
Mini-Review on the Redox Additives in Aqueous Electrolyte for High Performance Supercapacitors journal February 2020

Figures / Tables (6)