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High throughput electrochemical observation of structural phase changes in liFe1-xMnxPO4 during charge and discharge

High throughput electrochemical observation of structural phase changes in liFe1-xMnxPO4 during charge and discharge
High throughput electrochemical observation of structural phase changes in liFe1-xMnxPO4 during charge and discharge
Electrochemical lithium extraction and insertion in LiFe1-xMnxPO4 has been investigated by high throughput cyclic voltammetry on an array of samples with different degrees of carbon coating to assist electron transfer. A linear decrease in the capacity was observed with an increase in the value of x and was explained by a gradual loss of electronic conductivity due to the manganese substituent. Slow scan voltammograms show differences in peak shapes corresponding to a heterogeneous (two-phase) reaction in LiFePO4 and a homogeneous (one-phase) reaction of iron in LiFe0.2Mn0.8PO4, illustrating a general interpretation of voltammograms to differentiate these mechanisms.
association, charge exchange, electrochemistry, iron compounds, lithium compounds, manganese compounds, solid-state phase transformations, voltammetry (chemical analysis)
0013-4651
A381-A386
Roberts, Mattthew
cedddfc9-c081-4e50-9522-b39e4bd4edd5
Vitins, GIrts
99d664d4-cac7-452a-96e0-768feea6eef2
Denuault, Guy
5c76e69f-e04e-4be5-83c5-e729887ffd4e
Owen, John
067986ea-f3f3-4a83-bc87-7387cc5ac85d
Roberts, Mattthew
cedddfc9-c081-4e50-9522-b39e4bd4edd5
Vitins, GIrts
99d664d4-cac7-452a-96e0-768feea6eef2
Denuault, Guy
5c76e69f-e04e-4be5-83c5-e729887ffd4e
Owen, John
067986ea-f3f3-4a83-bc87-7387cc5ac85d

Roberts, Mattthew, Vitins, GIrts, Denuault, Guy and Owen, John (2010) High throughput electrochemical observation of structural phase changes in liFe1-xMnxPO4 during charge and discharge. Journal of the Electrochemical Society, 157 (4), A381-A386. (doi:10.1149/1.3294564).

Record type: Article

Abstract

Electrochemical lithium extraction and insertion in LiFe1-xMnxPO4 has been investigated by high throughput cyclic voltammetry on an array of samples with different degrees of carbon coating to assist electron transfer. A linear decrease in the capacity was observed with an increase in the value of x and was explained by a gradual loss of electronic conductivity due to the manganese substituent. Slow scan voltammograms show differences in peak shapes corresponding to a heterogeneous (two-phase) reaction in LiFePO4 and a homogeneous (one-phase) reaction of iron in LiFe0.2Mn0.8PO4, illustrating a general interpretation of voltammograms to differentiate these mechanisms.

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Published date: 9 February 2010
Keywords: association, charge exchange, electrochemistry, iron compounds, lithium compounds, manganese compounds, solid-state phase transformations, voltammetry (chemical analysis)

Identifiers

Local EPrints ID: 146313
URI: http://eprints.soton.ac.uk/id/eprint/146313
ISSN: 0013-4651
PURE UUID: f52b8248-77b4-4d89-9f60-5fcf977853f4
ORCID for Guy Denuault: ORCID iD orcid.org/0000-0002-8630-9492
ORCID for John Owen: ORCID iD orcid.org/0000-0002-4938-3693

Catalogue record

Date deposited: 19 May 2010 10:18
Last modified: 07 Oct 2020 01:36

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