Effect of Vinylene Carbonate Electrolyte Additive on the Surface Chemistry and Pseudocapacitive Sodium-Ion Storage of TiO<sub>2</sub> Nanosheet Anodes
Although titanium dioxide has gained much attention as a sodium-ion battery anode material, obtaining high specific capacity and cycling stability remains a challenge. Herein, we report significantly improved surface chemistry and pseudocapacitive Na-ion storage performance of TiO<sub>2</su...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | Batteries |
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| Online Access: | https://www.mdpi.com/2313-0105/7/1/1 |
| _version_ | 1818062964756840448 |
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| author | Rudi Ruben Maça Vinodkumar Etacheri |
| author_facet | Rudi Ruben Maça Vinodkumar Etacheri |
| author_sort | Rudi Ruben Maça |
| collection | DOAJ |
| description | Although titanium dioxide has gained much attention as a sodium-ion battery anode material, obtaining high specific capacity and cycling stability remains a challenge. Herein, we report significantly improved surface chemistry and pseudocapacitive Na-ion storage performance of TiO<sub>2</sub> nanosheet anode in vinylene carbonate (VC)-containing electrolyte solution. In addition to the excellent pseudocapacitance (~87%), the TiO<sub>2</sub> anodes also exhibited increased high-specific capacity (219 mAh/g), rate performance (40 mAh/g @ 1 A/g), coulombic efficiency (~100%), and cycling stability (~90% after 750 cycles). Spectroscopic and microscopic studies confirmed polycarbonate based solid electrolyte interface (SEI) formation in VC-containing electrolyte solution. The superior electrochemical performance of the TiO<sub>2</sub> nanosheet anode in VC-containing electrolyte solution is credited to the improved pseudocapacitive Na-ion diffusion through the polycarbonate based SEI (coefficients of 1.65 × 10<sup>−14</sup> for PC-VC vs. 6.42 × 10<sup>−16</sup> for PC). This study emphasizes the crucial role of the electrolyte solution and electrode–electrolyte interfaces in the improved pseudocapacitive Na-ion storage performance of TiO<sub>2</sub> anodes. |
| first_indexed | 2024-12-10T14:12:35Z |
| format | Article |
| id | doaj.art-ea234e4579f944e09e0babf753fba105 |
| institution | Directory Open Access Journal |
| issn | 2313-0105 |
| language | English |
| last_indexed | 2024-12-10T14:12:35Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Batteries |
| spelling | doaj.art-ea234e4579f944e09e0babf753fba1052022-12-22T01:45:26ZengMDPI AGBatteries2313-01052020-12-0171110.3390/batteries7010001Effect of Vinylene Carbonate Electrolyte Additive on the Surface Chemistry and Pseudocapacitive Sodium-Ion Storage of TiO<sub>2</sub> Nanosheet AnodesRudi Ruben Maça0Vinodkumar Etacheri1Electrochemistry Division, IMDEA Materials Institute, 28906 Madrid, SpainElectrochemistry Division, IMDEA Materials Institute, 28906 Madrid, SpainAlthough titanium dioxide has gained much attention as a sodium-ion battery anode material, obtaining high specific capacity and cycling stability remains a challenge. Herein, we report significantly improved surface chemistry and pseudocapacitive Na-ion storage performance of TiO<sub>2</sub> nanosheet anode in vinylene carbonate (VC)-containing electrolyte solution. In addition to the excellent pseudocapacitance (~87%), the TiO<sub>2</sub> anodes also exhibited increased high-specific capacity (219 mAh/g), rate performance (40 mAh/g @ 1 A/g), coulombic efficiency (~100%), and cycling stability (~90% after 750 cycles). Spectroscopic and microscopic studies confirmed polycarbonate based solid electrolyte interface (SEI) formation in VC-containing electrolyte solution. The superior electrochemical performance of the TiO<sub>2</sub> nanosheet anode in VC-containing electrolyte solution is credited to the improved pseudocapacitive Na-ion diffusion through the polycarbonate based SEI (coefficients of 1.65 × 10<sup>−14</sup> for PC-VC vs. 6.42 × 10<sup>−16</sup> for PC). This study emphasizes the crucial role of the electrolyte solution and electrode–electrolyte interfaces in the improved pseudocapacitive Na-ion storage performance of TiO<sub>2</sub> anodes.https://www.mdpi.com/2313-0105/7/1/1electrolyteadditiveinterfacepseudocapacitanceintercalationenergy storage |
| spellingShingle | Rudi Ruben Maça Vinodkumar Etacheri Effect of Vinylene Carbonate Electrolyte Additive on the Surface Chemistry and Pseudocapacitive Sodium-Ion Storage of TiO<sub>2</sub> Nanosheet Anodes Batteries electrolyte additive interface pseudocapacitance intercalation energy storage |
| title | Effect of Vinylene Carbonate Electrolyte Additive on the Surface Chemistry and Pseudocapacitive Sodium-Ion Storage of TiO<sub>2</sub> Nanosheet Anodes |
| title_full | Effect of Vinylene Carbonate Electrolyte Additive on the Surface Chemistry and Pseudocapacitive Sodium-Ion Storage of TiO<sub>2</sub> Nanosheet Anodes |
| title_fullStr | Effect of Vinylene Carbonate Electrolyte Additive on the Surface Chemistry and Pseudocapacitive Sodium-Ion Storage of TiO<sub>2</sub> Nanosheet Anodes |
| title_full_unstemmed | Effect of Vinylene Carbonate Electrolyte Additive on the Surface Chemistry and Pseudocapacitive Sodium-Ion Storage of TiO<sub>2</sub> Nanosheet Anodes |
| title_short | Effect of Vinylene Carbonate Electrolyte Additive on the Surface Chemistry and Pseudocapacitive Sodium-Ion Storage of TiO<sub>2</sub> Nanosheet Anodes |
| title_sort | effect of vinylene carbonate electrolyte additive on the surface chemistry and pseudocapacitive sodium ion storage of tio sub 2 sub nanosheet anodes |
| topic | electrolyte additive interface pseudocapacitance intercalation energy storage |
| url | https://www.mdpi.com/2313-0105/7/1/1 |
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