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Anatase TiO2 as an Anode Material for Rechargeable Aqueous Aluminum-Ion Batteries: Remarkable Graphene Induced Aluminum Ion Storage Phenomenon
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2017-11-15 00:00:00 , DOI: 10.1021/acs.jpcc.7b09494 Homen Lahan 1 , Ratan Boruah 1 , Anil Hazarika 2 , Shyamal K. Das 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2017-11-15 00:00:00 , DOI: 10.1021/acs.jpcc.7b09494 Homen Lahan 1 , Ratan Boruah 1 , Anil Hazarika 2 , Shyamal K. Das 1
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The electrochemical intercalation and extraction of Al3+ ion in anatase TiO2 is illustrated in various aqueous electrolytes in an attempt to demonstrate the viability of TiO2 as an anode material for rechargeable aqueous aluminum-ion batteries. It is well understood that the primary barrier for diffusion of Al3+ ion in TiO2 is the poor electronic conductivity of TiO2. It is revealed that a small fraction of graphene (<2 wt %) could induce ultrafast diffusion of Al3+ ion in TiO2. Estimation shows that graphene remarkably enhances the Al3+ ion diffusion coefficient in TiO2 by 672 times. Discharge capacities in the range of 33–50 mAhg–1 are obtained at a high current rate of 6.25Ag–1for graphene incorporated TiO2. It is also seen that the nature of electrolytes critically influences the Al3+ ion insertion phenomenon. The possibility of reversible crystal phase transition of TiO2 to aluminium titanate due to Al3+ ion intercalation-extraction is also demonstrated for the first time.
中文翻译：
锐钛矿型TiO 2作为可充电铝离子电池的阳极材料：显着的石墨烯诱导的铝离子存储现象
在各种水性电解质中说明了锐钛矿型TiO 2中Al 3+离子的电化学嵌入和萃取，以试图证明TiO 2作为可再充电水性铝离子电池阳极材料的可行性。很容易理解，对于Al的扩散主要阻挡3+以TiO离子2是TiO 2的差的电子电导率2。结果表明，少量的石墨烯（<2 wt％）可以诱导Al 3+离子在TiO 2中超快扩散。估算表明，石墨烯显着提高了TiO 2中的Al 3+离子扩散系数672次 对于掺入石墨烯的TiO 2，在6.25Ag –1的高电流速率下可获得33–50 mAhg –1的放电容量。还可以看出，电解质的性质严重影响了Al 3+离子的插入现象。还首次证明了由于Al 3+离子的插层-萃取而导致TiO 2向钛酸铝可逆的晶体相变的可能性。
更新日期：2017-11-15
中文翻译：
锐钛矿型TiO 2作为可充电铝离子电池的阳极材料：显着的石墨烯诱导的铝离子存储现象
在各种水性电解质中说明了锐钛矿型TiO 2中Al 3+离子的电化学嵌入和萃取，以试图证明TiO 2作为可再充电水性铝离子电池阳极材料的可行性。很容易理解，对于Al的扩散主要阻挡3+以TiO离子2是TiO 2的差的电子电导率2。结果表明，少量的石墨烯（<2 wt％）可以诱导Al 3+离子在TiO 2中超快扩散。估算表明，石墨烯显着提高了TiO 2中的Al 3+离子扩散系数672次 对于掺入石墨烯的TiO 2，在6.25Ag –1的高电流速率下可获得33–50 mAhg –1的放电容量。还可以看出，电解质的性质严重影响了Al 3+离子的插入现象。还首次证明了由于Al 3+离子的插层-萃取而导致TiO 2向钛酸铝可逆的晶体相变的可能性。
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