首页|Ion Exchange of Layer Structured Niobate Cs_4Nb_6O_(17)·3H_2O and Its Application as Cathode Material in a Rechargeable Lithium Battery
Ion Exchange of Layer Structured Niobate Cs_4Nb_6O_(17)·3H_2O and Its Application as Cathode Material in a Rechargeable Lithium Battery
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NETL
NSTL
Trans Tech Publications Ltd
The layer structured niobate Cs_4Nb_6O_(17)·3H_2O has been prepared in a solid state reaction using Cs_2CO_3 and Nb_2O_5 at 1073 K. Ion exchange reactions of Cs~+ in the interlayer space were studied in aqueous solutions. The single phases of lithium, sodium and hydrogen ion exchange products were obtained and they also contained interlayer water. The interlayer water of the lithium ion exchange product was removed by heating at 453 K in a vacuum. The resulting niobate Cs_(0.26)Li_(3.01)H_(0.73)Nb_6O_(17) was evaluated for its use as the cathode in a rechargeable lithium battery. The cathode exhibited discharge and charge capacities of 120 and 110 mAhg~(-1) for the first cycle in the voltage range of 1.5 - 4.2 V. The amount of Li~+ intercalated and deintercalated were 4.0 and 3.6 of the formula unit, respectively.
NETL
NSTL
Trans Tech Publications Ltd
