Predicting capacity of hard carbon anodes in sodium-ion batteries using porosity measurements

Journal Article · Mon Sep 01 00:00:00 EDT 2014 · Carbon

DOI:https://doi.org/10.1016/j.carbon.2014.04.064· OSTI ID:1211017

Bommier, C; Luo, W; Gao, WY; Greaney, A; Ma, SQ; Ji, X

We report an inverse relationship between measurable porosity values and reversible capacity from sucrose-derived hard carbon as an anode for sodium-ion batteries (SIBs). Materials with low measureable pore volumes and surface areas obtained through N-2 sorption yield higher reversible capacities. Conversely, increasing measurable porosity and specific surface area leads to sharp decreases in reversible capacity. Utilizing a low porosity material, we thus are able to obtain a reversible capacity of 335 mAh g(-1). These findings suggest that sodium-ion storage is highly dependent on the absence of pores detectable through N-2 sorption in sucrose-derived carbon. (C) 2014 Elsevier Ltd. All rights reserved.

• Sponsoring Organization: USDOE Advanced Research Projects Agency - Energy (ARPA-E)
• DOE Contract Number: DE-AR0000297TDD
• OSTI ID: 1211017
• Journal Information: Carbon, Vol. 76; ISSN 0008-6223
• Country of Publication: United States
• Language: English