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Comparison of Aqueous- and Non-Aqueous-Based Binder Polymers and the Mixing Ratios for Zn//MnO2 Batteries with Mildly Acidic Aqueous Electrolytes

  • Considering the literature for aqueous rechargeable Zn//MnO2 batteries with acidic electrolytes using the doctor blade coating of the active material (AM), carbon black (CB), and binder polymer (BP) for the positive electrode fabrication, different binder types with (non-)aqueous solvents were introduced so far. Furthermore, in most of the cases, relatively high passive material (CB+BP) shares ~30Considering the literature for aqueous rechargeable Zn//MnO2 batteries with acidic electrolytes using the doctor blade coating of the active material (AM), carbon black (CB), and binder polymer (BP) for the positive electrode fabrication, different binder types with (non-)aqueous solvents were introduced so far. Furthermore, in most of the cases, relatively high passive material (CB+BP) shares ~30 wt% were applied. The first part of this work focuses on different selected BPs: polyacrylonitrile (PAN), carboxymethyl cellulose (CMC), styrene butadiene rubber (SBR), cellulose acetate (CA), and nitrile butadiene rubber (NBR). They were used together with (non-)aqueous solvents: DI-water, methyl ethyl ketone (MEK), and dimethyl sulfoxide (DMSO). By performing mechanical, electrochemical and optical characterizations, a better overall performance of the BPs using aqueous solvents was found in aqueous 2 M ZnSO4 + 0.1 M MnSO4 electrolyte (i.e., BP LA133: 150 mAh·g−1 and 189 mWh·g−1 @ 160 mA·g−1). The second part focuses on the mixing ratio of the electrode components, aiming at the decrease of the commonly used passive material share of ~30 wt% for an industrial-oriented electrode fabrication, while still maintaining the electrochemical performance. Here, the absolute CB share and the CB/BP ratio are found to be important parameters for an application-oriented electrode fabrication (i.e., high energy/power applications).show moreshow less

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Metadaten
Author:Oliver Fitz, Stefan Ingenhoven, Christian Bischoff, Harald Gentischer, Kai Peter Birke, Dragos Saracsan, Daniel Biro
Publisher:MDPI
Place of publication:Basel
Year of Publication:2021
Page Number:18
Language:English
Tag:SEM+EDX; doctor blade coating; electrochemical impedance spectroscopy; electrode fabrication; manganese dioxide; mixing ratio; polymer binder; solvent; stationary energy storage; zinc ion batteries
Parent Title (English):Batteries
Volume:7
Issue:2
ISSN:2313-0105
Document Type:Article (reviewed)
Open Access:Frei zugänglich
Institutes:Bibliografie
Release Date:2021/08/16
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International
URN:urn:nbn:de:bsz:ofb1-opus4-49087
URL:https://www.mdpi.com/2313-0105/7/2/40
DOI:https://doi.org/10.3390/batteries7020040