Flexible and free-standing bacterial cellulose derived cathode host and separator for lithium-sulfur batteries

Bharti, Vikram Kishore and Sharma, Chandra Shekhar and Khandelwal, Mudrika and et al, . (2022) Flexible and free-standing bacterial cellulose derived cathode host and separator for lithium-sulfur batteries. Carbohydrate Polymers, 293. pp. 1-16. ISSN 0144-8617

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Abstract

This study demonstrates flexible, ultra-high rate, and long cycle life lithium‑sulfur batteries using bacterial cellulose (BC) derived cathode host as well as separator. The work also includes a new strategy to use active sulfur in the form of catholyte added directly to the electrolyte for improved sulfur utilization. The fabricated Li[sbnd]S cell with carbonized bacterial cellulose (CBC) as a cathode host and BC as a separator (CBC@BC) delivers an impressive capacity of 740 mAh g−1 at 1C. It retains a capacity of 310 mAh g−1 even at an ultra-high rate of 4C. To have commercial adoption of CBC@BC, we tested Li[sbnd]S cells with a high areal loading of 5 mg cm−2. The cell shows promising electrochemical performance for 500 cycles with a capacity retention of 82 %. Furthermore, first-principle calculations are performed to understand the interaction of soluble lithium-polysulfides with bacterial cellulose-derived material. © 2022 Elsevier Ltd

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IITH Creators:

IITH Creators	ORCiD
Sharma, Chandra Shekhar	https://orcid.org/0000-0003-3821-1471
Khandelwal, Mudrika	https://orcid.org/0000-0001-9717-5381

Item Type:

Article

Additional Information:

The authors would like to acknowledge DST-FIST SEM (JEOL JSM 7800F) facility at Materials Science and Metallurgical Engineering (MSME), IIT Hyderabad. The authors acknowledge Dr. Akhilesh Kumar Singh at IIT Bhubaneswar for providing computational resources support. The authors also acknowledge financial support from SERB (CRG/2018/004441) and Prime Minister's Research Fellowship (PMRF). VKB also acknowledges the support from Ms. Tulika Vashist (CARBON Lab, IIT Hyderabad) for language corrections in the original draft.

Uncontrolled Keywords:

Bacterial cellulose; Free-standing cathode substrate; Li2S6 catholyte; Lithium‑sulfur batteries; Separator

Subjects:

Others > Metallurgy Metallurgical Engineering
Materials Engineering > Materials engineering
Chemical Engineering

Divisions:

Department of Chemical Engineering
Department of Material Science Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

27 Jul 2022 05:37

Last Modified:

27 Jul 2022 05:37