The University of Southampton
University of Southampton Institutional Repository

Silicon nanowires for high energy lithium-ion battery negative electrodes

Silicon nanowires for high energy lithium-ion battery negative electrodes
Silicon nanowires for high energy lithium-ion battery negative electrodes
Samples of silicon nanowire materials, produced by Merck KGaA via a batched supercritical fluid method, were evaluated within composite electrodes for use as the active component in future lithium-ion battery negative electrodes. A comprehensive literature review of silicon based negative electrodes with a focus on silicon based composite type electrodes is provided. Characterisation of the nanowire materials was conducted via electron microscopy. Composite type electrodes were prepared utilising poly-acrylic acid as a binder material. Insight into the interaction of poly-acrylic acid with batch-1 nanowire material was achieved via a FTIR spectroscopy study, evidence for the formation of a binding interaction was observed.
Composite electrodes containing nanowire material were electrochemically evaluated via the use of half-cells. The performance of the nanowire material samples was found to be significantly different and attributed to the use of differing precursor chemicals for synthesis. The structural variation of silicon nanowire particles within a composite electrode was investigated throughout an initial cycle and extended cycling. The electrochemical performance of composite electrodes containing the nanowire materials was found to depend critically on the composite electrode formulation and the electrolyte solution used. The rate performance was also observed to be influenced by the electrode formulation, suggesting the electronic and ionic conductivity of the composite electrode to be the rate limiting factors of the composite electrodes tested. Through the optimisation of composite electrode formulation and electrolyte, extended cycling at a capacity of over 600 mA h g-1(Composite) for 200 electrochemical cycles at a C-rate of C/10 was achieved, the highest number of cycles reported for SFLS silicon nanowire materials to date.
Locke, Jacob
bbb0e4d0-aac9-48a0-8fc3-6fff18c48dac
Locke, Jacob
bbb0e4d0-aac9-48a0-8fc3-6fff18c48dac
Owen, John
067986ea-f3f3-4a83-bc87-7387cc5ac85d

(2015) Silicon nanowires for high energy lithium-ion battery negative electrodes. University of Southampton, Chemistry, Doctoral Thesis, 239pp.

Record type: Thesis (Doctoral)

Abstract

Samples of silicon nanowire materials, produced by Merck KGaA via a batched supercritical fluid method, were evaluated within composite electrodes for use as the active component in future lithium-ion battery negative electrodes. A comprehensive literature review of silicon based negative electrodes with a focus on silicon based composite type electrodes is provided. Characterisation of the nanowire materials was conducted via electron microscopy. Composite type electrodes were prepared utilising poly-acrylic acid as a binder material. Insight into the interaction of poly-acrylic acid with batch-1 nanowire material was achieved via a FTIR spectroscopy study, evidence for the formation of a binding interaction was observed.
Composite electrodes containing nanowire material were electrochemically evaluated via the use of half-cells. The performance of the nanowire material samples was found to be significantly different and attributed to the use of differing precursor chemicals for synthesis. The structural variation of silicon nanowire particles within a composite electrode was investigated throughout an initial cycle and extended cycling. The electrochemical performance of composite electrodes containing the nanowire materials was found to depend critically on the composite electrode formulation and the electrolyte solution used. The rate performance was also observed to be influenced by the electrode formulation, suggesting the electronic and ionic conductivity of the composite electrode to be the rate limiting factors of the composite electrodes tested. Through the optimisation of composite electrode formulation and electrolyte, extended cycling at a capacity of over 600 mA h g-1(Composite) for 200 electrochemical cycles at a C-rate of C/10 was achieved, the highest number of cycles reported for SFLS silicon nanowire materials to date.

PDF
Electronic version without declaration (1).pdf - Other
Download (13MB)

More information

Published date: 19 October 2015
Organisations: University of Southampton, Chemistry

Identifiers

Local EPrints ID: 384922
URI: http://eprints.soton.ac.uk/id/eprint/384922
PURE UUID: 159bc522-3474-48a7-b38e-3ca336dd79e9
ORCID for John Owen: ORCID iD orcid.org/0000-0002-4938-3693

Catalogue record

Date deposited: 08 Jan 2016 10:47
Last modified: 19 Oct 2018 04:01

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×