MODIFICATION OF INTERLAYER DISTANCES OF TITANATES BY CHANGING PH THEIR USE AS A LITHIUM-ION BATTERY ANODE WITH HIGH CAPACITY AND RATE CAPABILITY

摘要

Development of lithium-ion batteries operating at high charge and discharge rates is highly demanded especially for electronic devices and electric vehicles [1]. For this purpose, improvement of ion transport in the crystal structure is needed [2]. The general strategy is reducing down the particle size to a nanometer scale. This helps to decrease the ion diffusion length [3]. Titanate nanotubes are promising materials because of their special morphology and high specific surface area. The nanotubes are formed by rolling-up of titanate nanosheets [4]. These titanates provide high rate capability and low volume expansion upon lithiation [5]. More importantly their tubular structure helps the transport of ions through the crystal.