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Title: TiS2–Polysulfide Hybrid Cathode with High Sulfur Loading and Low Electrolyte Consumption for Lithium–Sulfur Batteries

Journal Article · · ACS Energy Letters
 [1];  [2]; ORCiD logo [2]
  1. Univ. of Texas at Austin, Austin, TX (United States); University of Texas at Austin
  2. Univ. of Texas at Austin, Austin, TX (United States)
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Sulfur cathodes have a high theoretical capacity of 1675 mAh g–1, making the lithium–sulfur batteries a promising technology for future energy-storage devices. However, their commercial viability is faced with challenges arising from intrinsic electrochemical instabilities and inappropriate cell fabrication parameters. We report here the feasibility of employing TiS2 as a conductive polysulfide adsorbent, which allows the use of a high amount of electrochemically active polysulfides in building a TiS2–polysulfide hybrid cathode. The hybrid cathode exhibits long cycle stability at a C/5 rate over 200 cycles with a high areal capacity and energy density of, respectively, 10 mAh cm–2 and 20 mWh cm–2, exceeding those of commercial LiCoO2. Furthermore, such an enhanced electrochemical performance is obtained in cells with a high sulfur content (65 wt %), high sulfur loading (12 mg cm–2), high sulfur mass (12 mg/cathode), and a low electrolyte/sulfur ratio of just 5 μL mg–1.

Research Organization:
Univ. of Texas at Austin, Austin, TX (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0007218
OSTI ID:
1488315
Journal Information:
ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 3 Vol. 3; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (26)

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Edge‐Enriched Ultrathin MoS 2 Embedded Yolk‐Shell TiO 2 with Boosted Charge Transfer for Superior Photocatalytic H 2 Evolution journal July 2019
A 3D Nitrogen-Doped Graphene/TiN Nanowires Composite as a Strong Polysulfide Anchor for Lithium-Sulfur Batteries with Enhanced Rate Performance and High Areal Capacity journal September 2018
Long-Life Lithium-Sulfur Batteries with a Bifunctional Cathode Substrate Configured with Boron Carbide Nanowires journal August 2018
A Lithium-Sulfur Battery using a 2D Current Collector Architecture with a Large-Sized Sulfur Host Operated under High Areal Loading and Low E/S Ratio journal October 2018
Current Status and Future Prospects of Metal–Sulfur Batteries journal May 2019
Boosting High‐Rate Li–S Batteries by an MOF‐Derived Catalytic Electrode with a Layer‐by‐Layer Structure journal June 2019
Programmed Design of a Lithium–Sulfur Battery Cathode by Integrating Functional Units journal July 2019
Rational Design of a Dual-Function Hybrid Cathode Substrate for Lithium-Sulfur Batteries journal June 2018
A Li 2 S‐TiS 2 ‐Electrolyte Composite for Stable Li 2 S‐Based Lithium–Sulfur Batteries journal June 2019
Electrocatalysis in Lithium Sulfur Batteries under Lean Electrolyte Conditions journal October 2018
Electrocatalysis in Lithium Sulfur Batteries under Lean Electrolyte Conditions journal October 2018
Hierarchical flower-like cobalt phosphosulfide derived from Prussian blue analogue as an efficient polysulfides adsorbent for long-life lithium-sulfur batteries journal March 2019
Structural Design of Lithium–Sulfur Batteries: From Fundamental Research to Practical Application journal June 2018
Harnessing the unique properties of 2D materials for advanced lithium–sulfur batteries journal January 2019
SnS 2 /TiO 2 nanohybrids chemically bonded on nitrogen-doped graphene for lithium–sulfur batteries: synergy of vacancy defects and heterostructures journal January 2018
Vertically oriented TiS 2−x nanobelt arrays as binder- and carbon-free intercalation electrodes for Li- and Na-based energy storage devices journal January 2018
Facile preparation of ultrafine Ti 4 O 7 nanoparticle-embedded porous carbon for high areal capacity lithium–sulfur batteries journal January 2018
Revisiting the positive roles of liquid polysulfides in alkali metal–sulfur electrochemistry: from electrolyte additives to active catholyte journal January 2019
TiS 2 nanosheets for efficient electrocatalytic N 2 fixation to NH 3 under ambient conditions journal January 2019
Rational design of free-standing 3D porous MXene/rGO hybrid aerogels as polysulfide reservoirs for high-energy lithium–sulfur batteries journal January 2019
Doping induced charge density wave in monolayer TiS 2 and phonon-mediated superconductivity journal January 2020
Synthesis of CoO nanocrystals decorated porous carbon nanotube microspheres as sulfur host for high performance Li/S batteries journal October 2019
Building High Performance Li-S Batteries by Compositing Nanosized Sulfur and Conductive Adsorbent within MWCNTs journal January 2019

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