Loughborough University
Leicestershire, UK
LE11 3TU
+44 (0)1509 263171
Loughborough University

Loughborough University Institutional Repository

Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/26302

Title: A high-volumetric-capacity cathode based on interconnected close-packed N-doped porous carbon nanospheres for long-life lithium–sulfur batteries
Authors: Hu, Cheng
Kirk, Caroline A.
Cai, Qiong
Cuadrado-Collados, Carlos
Silvestre-Albero, Joaquin
Rodriguez-Reinoso, Francisco
Biggs, Mark J.
Keywords: Close packed
High volumetric capacity
Interconnected carbon nanospheres
Li–S batteries
Monodisperse
Issue Date: 2017
Publisher: © Wiley
Citation: HU, C. ... et al, 2017. A high-volumetric-capacity cathode based on interconnected close-packed N-doped porous carbon nanospheres for long-life lithium–sulfur batteries. Advanced Energy Materials, doi:10.1002/aenm.201701082.
Abstract: This study reports a Li–S battery cathode of high volumetric capacity enabled by novel micro- and mesostructuring. The cathode is based on monodis-perse highly porous carbon nanospheres derived from a facile template- and surfactant-free method. At the mesoscale, the nanospheres structure into interconnected close-packed clusters of a few microns in extent, thus facili-tating the fabrication of dense crack-free high areal sulfur loading (5 mg cm−2) cathodes with high electrical conductivity and low cathode impedance. A combination of the nitrogen doping (5 wt%), high porosity (2.3 cm3 g−1), and surface area (2900 m2 g−1) at the microscale enables high sulfur immobiliza-tion and utilization. The cathode delivers among the best reported volumetric capacity to date, above typical Li-ion areal capacity at 0.2 C over 200 cycles and low capacity fading of 0.1% per cycle at 0.5 C over 500 cycles. The compact cathode structure also ensures a low electrolyte requirement (6 µL mg−1), which aids a low overall cell weight, and further, among the best gravimetric capacities published to date as well.
Description: This paper is closed access until 21st August 2018.
Sponsor: Q.C. gratefully acknowledges the support by the EPSRC program EP/M027066/1.
Version: Accepted for publication
DOI: 10.1002/aenm.201701082
URI: https://dspace.lboro.ac.uk/2134/26302
Publisher Link: http://dx.doi.org/10.1002/aenm.201701082
ISSN: 1614-6832
Appears in Collections:Closed Access (Chemistry)

Files associated with this item:

File Description SizeFormat
Manuscript as accepted.pdfAccepted version2.01 MBAdobe PDFView/Open

 

SFX Query

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.