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Open AccessArticle

Electrospun 3D Structured Carbon Current Collector for Li/S Batteries

1
National Laboratory Astana, Nazarbayev University, Institute of Batteries, Nur-Sultan 010000, Kazakhstan
2
School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan
3
Department of Chemistry, Marmara University, Istanbul 34722, Turkey
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(4), 745; https://doi.org/10.3390/nano10040745
Received: 12 February 2020 / Revised: 5 March 2020 / Accepted: 9 March 2020 / Published: 14 April 2020
(This article belongs to the Section Energy and Catalysis)
Light weight carbon nanofibers (CNF) fabricated by a simple electrospinning method and used as a 3D structured current collector for a sulfur cathode. Along with a light weight, this 3D current collector allowed us to accommodate a higher amount of sulfur composite, which led to a remarkable increase of the electrode capacity from 200 to 500 mAh per 1 g of the electrode including the mass of the current collector. Varying the electrospinning solution concentration enabled obtaining carbonized nanofibers of uniform structure and controllable diameter from several hundred nanometers to several micrometers. The electrochemical performance of the cathode deposited on carbonized PAN nanofibers at 800 °C was investigated. An initial specific capacity of 1620 mAh g−1 was achieved with a carbonized PAN nanofiber (cPAN) current collector. It exhibited stable cycling over 100 cycles maintaining a reversible capacity of 1104 mAh g−1 at the 100th cycle, while the same composite on the Al foil delivered only 872 mAh g−1. At the same time, 3D structured CNFs with a highly developed surface have a very low areal density of 0.85 mg cm−2 (thickness of ~25 µm), which is lower for almost ten times than the commercial Al current collector with the same thickness (7.33 mg cm−2). View Full-Text
Keywords: carbon nanofibers; lithium-sulfur battery; electrospinning method; electrode capacity; current collector carbon nanofibers; lithium-sulfur battery; electrospinning method; electrode capacity; current collector
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MDPI and ACS Style

Kalybekkyzy, S.; Mentbayeva, A.; Yerkinbekova, Y.; Baikalov, N.; Kahraman, M.V.; Bakenov, Z. Electrospun 3D Structured Carbon Current Collector for Li/S Batteries. Nanomaterials 2020, 10, 745.

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