@article{35414, author = {Wei Yin and Judith Alvarado and G{\"o}zde Barim and M C Scott and Xinxing Peng and Marca M Doeff}, title = {A layered nonstoichiometric lepidocrocite-type sodium titanate anode material for sodium-ion batteries}, abstract = {
A lepidocrocite-structured sodium titanate prepared by ion-exchange of a Cs-containing precursor shows promise as an anode material for sodium ion batteries, with a discharge capacity of up to 229\ mAh\ g-1\ at an average potential of about 0.6\ V vs. Na+/Na. Titanium vacancies in the metal oxide layers provide additional sites for sodium intercalation in addition to interlayer sites, which accounts for the higher capacity compared to other previously reported lepidocrocite-structured titanates. By screening a series of electrolyte formulations and binders, we were able to improve the first-cycle coulombic efficiency to 81.8\% and 94.7\% respectively using CMC/SBR-based and binder-free electrodes in ether electrolytes. The electrochemical consequences of short-term air-exposure on the electrodes are also discussed.
}, year = {2021}, booktitle = {MRS Energy \& Sustainability}, journal = {MRS Energy \& Sustainability}, series = {MRS Energy \& Sustainability}, volume = {8}, pages = {88 - 97}, month = {09/2021}, issn = {2329-2229}, url = {https://link.springer.com/10.1557/s43581-021-00008-6}, doi = {10.1557/s43581-021-00008-6}, language = {eng}, }