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Article

Highly Porous Free-Standing rGO/SnO2 Pseudocapacitive Cathodes for High-Rate and Long-Cycling Al-Ion Batteries

1
Max Planck Institute for Medical Research, 61920 Heidelberg, Germany
2
Institute for Materials Science, University of Stuttgart, 70569 Stuttgart, Germany
3
Institute for Micro Assembly Technology of the Hahn-Schickard, 70569 Stuttgart, Germany
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(10), 2024; https://doi.org/10.3390/nano10102024
Received: 14 September 2020 / Revised: 30 September 2020 / Accepted: 12 October 2020 / Published: 14 October 2020
(This article belongs to the Special Issue Nanostructured Materials for Energy Storage and Conversion)
Establishing energy storage systems beyond conventional lithium ion batteries requires the development of novel types of electrode materials. Such materials should be capable of accommodating ion species other than Li+, and ideally, these ion species should be of multivalent nature, such as Al3+. Along this line, we introduce a highly porous aerogel cathode composed of reduced graphene oxide, which is loaded with nanostructured SnO2. This binder-free hybrid not only exhibits an outstanding mechanical performance, but also unites the pseudocapacity of the reduced graphene oxide and the electrochemical storage capacity of the SnO2 nanoplatelets. Moreover, the combination of both materials gives rise to additional intercalation sites at their interface, further contributing to the total capacity of up to 16 mAh cm−3 at a charging rate of 2 C. The high porosity (99.9%) of the hybrid and the synergy of its components yield a cathode material for high-rate (up to 20 C) aluminum ion batteries, which exhibit an excellent cycling stability over 10,000 tested cycles. The electrode design proposed here has a great potential to meet future energy and power density demands for advanced energy storage devices. View Full-Text
Keywords: aluminum ion batteries; reduced graphene oxide; tin dioxide; 3D electrode materials; mechanical properties aluminum ion batteries; reduced graphene oxide; tin dioxide; 3D electrode materials; mechanical properties
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MDPI and ACS Style

Jahnke, T.; Raafat, L.; Hotz, D.; Knöller, A.; Diem, A.M.; Bill, J.; Burghard, Z. Highly Porous Free-Standing rGO/SnO2 Pseudocapacitive Cathodes for High-Rate and Long-Cycling Al-Ion Batteries. Nanomaterials 2020, 10, 2024. https://doi.org/10.3390/nano10102024

AMA Style

Jahnke T, Raafat L, Hotz D, Knöller A, Diem AM, Bill J, Burghard Z. Highly Porous Free-Standing rGO/SnO2 Pseudocapacitive Cathodes for High-Rate and Long-Cycling Al-Ion Batteries. Nanomaterials. 2020; 10(10):2024. https://doi.org/10.3390/nano10102024

Chicago/Turabian Style

Jahnke, Timotheus, Leila Raafat, Daniel Hotz, Andrea Knöller, Achim M. Diem, Joachim Bill, and Zaklina Burghard. 2020. "Highly Porous Free-Standing rGO/SnO2 Pseudocapacitive Cathodes for High-Rate and Long-Cycling Al-Ion Batteries" Nanomaterials 10, no. 10: 2024. https://doi.org/10.3390/nano10102024

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