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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
2010-02-09.
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| Subjects: | |
| Online Access: | Get fulltext |
| Summary: | 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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