Reversible Hydration Enabling High-Rate Aqueous Li-Ion Batteries
(2024) In ACS Energy Letters 9(3). p.959-966- Abstract
Layered TiS2 has been proposed as a versatile host material for various battery chemistries. Nevertheless, its compatibility with aqueous electrolytes has not been thoroughly understood. Herein, we report on a reversible hydration process to account for the electrochemical activity and structural evolution of TiS2 in a relatively dilute electrolyte for sustainable aqueous Li-ion batteries. Solvated water molecules intercalate in TiS2 layers together with Li+ cations, forming a hydrated phase with a nominal formula unit of Li0.38(H2O)2−δTiS2 as the end-product. We unambiguously confirm the presence of two layers of intercalated water by complementary... (More)
Layered TiS2 has been proposed as a versatile host material for various battery chemistries. Nevertheless, its compatibility with aqueous electrolytes has not been thoroughly understood. Herein, we report on a reversible hydration process to account for the electrochemical activity and structural evolution of TiS2 in a relatively dilute electrolyte for sustainable aqueous Li-ion batteries. Solvated water molecules intercalate in TiS2 layers together with Li+ cations, forming a hydrated phase with a nominal formula unit of Li0.38(H2O)2−δTiS2 as the end-product. We unambiguously confirm the presence of two layers of intercalated water by complementary electrochemical cycling, operando structural characterization, and computational simulation. Such a process is fast and reversible, delivering 60 mAh g-1 discharge capacity at a current density of 1250 mA g-1. Our work provides further design principles for high-rate aqueous Li-ion batteries based on reversible water cointercalation.
(Less)
- author
- organization
- publishing date
- 2024
- type
- Contribution to journal
- publication status
- published
- subject
- in
- ACS Energy Letters
- volume
- 9
- issue
- 3
- pages
- 8 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:85185611597
- ISSN
- 2380-8195
- DOI
- 10.1021/acsenergylett.4c00224
- language
- English
- LU publication?
- yes
- id
- d5c4d370-e9ba-49dc-af78-94cb63b02563
- date added to LUP
- 2024-03-19 14:18:11
- date last changed
- 2024-03-19 14:19:01
@article{d5c4d370-e9ba-49dc-af78-94cb63b02563, abstract = {{<p>Layered TiS<sub>2</sub> has been proposed as a versatile host material for various battery chemistries. Nevertheless, its compatibility with aqueous electrolytes has not been thoroughly understood. Herein, we report on a reversible hydration process to account for the electrochemical activity and structural evolution of TiS<sub>2</sub> in a relatively dilute electrolyte for sustainable aqueous Li-ion batteries. Solvated water molecules intercalate in TiS<sub>2</sub> layers together with Li<sup>+</sup> cations, forming a hydrated phase with a nominal formula unit of Li<sub>0.38</sub>(H<sub>2</sub>O)<sub>2−δ</sub>TiS<sub>2</sub> as the end-product. We unambiguously confirm the presence of two layers of intercalated water by complementary electrochemical cycling, operando structural characterization, and computational simulation. Such a process is fast and reversible, delivering 60 mAh g<sup>-1</sup> discharge capacity at a current density of 1250 mA g<sup>-1</sup>. Our work provides further design principles for high-rate aqueous Li-ion batteries based on reversible water cointercalation.</p>}}, author = {{Zhang, Leiting and Kühling, Franziska and Mattsson, Agnes Matilda and Knijff, Lisanne and Hou, Xu and Ek, Gustav and Dufils, Thomas and Holm Gjørup, Frederik and Kantor, Innokenty and Zhang, Chao and Brant, William R. and Edström, Kristina and Berg, Erik J.}}, issn = {{2380-8195}}, language = {{eng}}, number = {{3}}, pages = {{959--966}}, publisher = {{The American Chemical Society (ACS)}}, series = {{ACS Energy Letters}}, title = {{Reversible Hydration Enabling High-Rate Aqueous Li-Ion Batteries}}, url = {{http://dx.doi.org/10.1021/acsenergylett.4c00224}}, doi = {{10.1021/acsenergylett.4c00224}}, volume = {{9}}, year = {{2024}}, }