Invention Grant
- Patent Title: Safe and flexible chitosan-based gel electrolyte in rechargeable zinc electrolytic manganese dioxide (EMD) alkaline batteries
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Application No.: US17508108Application Date: 2021-10-22
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Publication No.: US11870034B2Publication Date: 2024-01-09
- Inventor: Deepa Madan , Aswani Poosapati
- Applicant: University of Maryland, Baltimore County
- Applicant Address: US MD Baltimore
- Assignee: University of Maryland, Baltimore County
- Current Assignee: University of Maryland, Baltimore County
- Current Assignee Address: US MD Baltimore
- Agency: Casimir Jones, SC
- Agent Tristan A. Fuierer
- Main IPC: H01M10/0565
- IPC: H01M10/0565 ; H01M10/36 ; H01M4/66 ; H01M4/36 ; H01M4/48 ; H01M4/04 ; H01M4/24

Abstract:
Zinc electrolytic manganese dioxide (EMD) batteries including a high performing flexible chitosan-based gel electrolyte with poly-vinyl alcohol (PVA) and potassium hydroxide (KOH) additives were prepared. The Zn-EMD batteries were constructed using an optimized assembly technique employed to achieve good interfacial contact between the layers. Attaining energy densities between 150-250 Wh/kg (w.r.t cathode mass) is possible for these batteries, encouraging their use in wearable or flexible electronics. Using the chitosan-based gel electrolyte and limited voltage window testing, the prepared Zn-EMD alkaline batteries are among the best reported polymer-based alkaline electrolyte Zn rechargeable batteries.
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