Electrochemical performance of nano-SiO2 modified LiCoO2 thin films fabricated by electrostatic spray deposition (ESD)
With a mixture of a SiO2 so] and a solution of lithium and cobalt acetates as the precursor, nano-SiO2 modified LiCo02 films were fabricated by the electrostatic spray deposition (ESD) technique. The SiO2 content of these films was 0, 5, 10, 15 and 20 wt%, respectively. Their structure and electroch...
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| Veröffentlicht in: | Electrochimica acta 2006-04, Vol.51 (16), p.3292-3296 |
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| container_title | Electrochimica acta |
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| creator | YU, Y SHUI, J. L JIN, Y CHEN, C. H |
| description | With a mixture of a SiO2 so] and a solution of lithium and cobalt acetates as the precursor, nano-SiO2 modified LiCo02 films were fabricated by the electrostatic spray deposition (ESD) technique. The SiO2 content of these films was 0, 5, 10, 15 and 20 wt%, respectively. Their structure and electrochemical properties were characterized by means of X-ray diffraction, scanning electron microscopy, galvanostatic cell cycling, AC impedance spectroscopy and cyclic voltammetry. Li2CoSiO4 was found formed in the SiO2-containing films. The film with 15 wt% SiO2 shows the best cycling stability with the capacity of 130 mAh/g in the voltage range between 2.7 and 4.3 V at the current density of 0.1 mA/cm2. Due to its resulted small cell impedance, it has excellent rate capability. A LiCoO2 (shell)/SiO2 (core) structure model is proposed to explain the improved properties of these films. |
| doi_str_mv | 10.1016/j.electacta.2005.09.021 |
| format | Article |
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L ; JIN, Y ; CHEN, C. H</creator><creatorcontrib>YU, Y ; SHUI, J. L ; JIN, Y ; CHEN, C. H</creatorcontrib><description>With a mixture of a SiO2 so] and a solution of lithium and cobalt acetates as the precursor, nano-SiO2 modified LiCo02 films were fabricated by the electrostatic spray deposition (ESD) technique. The SiO2 content of these films was 0, 5, 10, 15 and 20 wt%, respectively. Their structure and electrochemical properties were characterized by means of X-ray diffraction, scanning electron microscopy, galvanostatic cell cycling, AC impedance spectroscopy and cyclic voltammetry. Li2CoSiO4 was found formed in the SiO2-containing films. The film with 15 wt% SiO2 shows the best cycling stability with the capacity of 130 mAh/g in the voltage range between 2.7 and 4.3 V at the current density of 0.1 mA/cm2. Due to its resulted small cell impedance, it has excellent rate capability. A LiCoO2 (shell)/SiO2 (core) structure model is proposed to explain the improved properties of these films.</description><identifier>ISSN: 0013-4686</identifier><identifier>EISSN: 1873-3859</identifier><identifier>DOI: 10.1016/j.electacta.2005.09.021</identifier><identifier>CODEN: ELCAAV</identifier><language>eng</language><publisher>Oxford: Elsevier</publisher><subject>Applied sciences ; Direct energy conversion and energy accumulation ; Electrical engineering. 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Due to its resulted small cell impedance, it has excellent rate capability. A LiCoO2 (shell)/SiO2 (core) structure model is proposed to explain the improved properties of these films.</description><subject>Applied sciences</subject><subject>Direct energy conversion and energy accumulation</subject><subject>Electrical engineering. Electrical power engineering</subject><subject>Electrical power engineering</subject><subject>Electrochemical conversion: primary and secondary batteries, fuel cells</subject><subject>Exact sciences and technology</subject><issn>0013-4686</issn><issn>1873-3859</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><recordid>eNpFkEFr3DAQhUVpoNu0v6G6tLQHuzPW2rKPZbtNCws5JDmLsTwiWmzLlZzC_vto2dDAwGOY92aGT4hPCCUCNt-PJY9sV8pVVgB1CV0JFb4RG2y1KlRbd2_FBgBVsW3a5p14n9IRAHSjYSP-7c_hGOwjT97SKBeOLsSJZssyODnTHIo7f1vJKQzeeR7kwe9C7tdHP0vnxylJR33M4TUP-5Pky8a00uqtTEukkxx4CcmvPszy6_7u57cP4srRmPjji16Lh1_7-93v4nB782f341BYhdu16DW0vaK-tYN2XNmBWnI1MqLtNDbI4Bza3m2dc1Z1DeHWMgIhqS6rVdfiy2XvEsPfJ06rmXyyPI40c3hKpmq7BrWuslFfjDZ_niI7s0Q_UTwZBHPmbI7mP2dz5mygM5lzTn5-OUEpA3Qxo_PpNZ4517XW6hmFIYPR</recordid><startdate>20060410</startdate><enddate>20060410</enddate><creator>YU, Y</creator><creator>SHUI, J. 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The film with 15 wt% SiO2 shows the best cycling stability with the capacity of 130 mAh/g in the voltage range between 2.7 and 4.3 V at the current density of 0.1 mA/cm2. Due to its resulted small cell impedance, it has excellent rate capability. A LiCoO2 (shell)/SiO2 (core) structure model is proposed to explain the improved properties of these films.</abstract><cop>Oxford</cop><pub>Elsevier</pub><doi>10.1016/j.electacta.2005.09.021</doi><tpages>5</tpages></addata></record> |
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| subjects | Applied sciences Direct energy conversion and energy accumulation Electrical engineering. Electrical power engineering Electrical power engineering Electrochemical conversion: primary and secondary batteries, fuel cells Exact sciences and technology |
| title | Electrochemical performance of nano-SiO2 modified LiCoO2 thin films fabricated by electrostatic spray deposition (ESD) |
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