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Mesoporous TiO2 nanosheets anchored on graphene for ultra long life Na-ion batteries

机译：中孔TiO2纳米片锚定石墨烯，用于超长寿命Na离子电池

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摘要

Sodium-ion batteries, which have a similar electrochemical reaction mechanism to lithium-ion batteries, have been considered as one of the most potential lithium-ion battery alternatives due to the rich reserves of sodium. However, it is very hard to find appropriate electrode materials imputing the large radius of sodium-ion. TiO2 is particularly interesting as anodes for sodium-ion batteries due to their reasonable operation voltage, cost, and nontoxicity. To obtain a better electrochemical property, mesoporous TiO2 nanosheets (NSs)/reduced graphene oxide (rGO) composites have been synthesized via a scalable hydrothermal-solvothermal method with a subsequent calcination process. Benefitting from unique structure design, TiO2 NSs@rGO exhibits a superior cycle stability (90 mAh g(-1) after 10 000 cycles at a high current rate of 20 C) and satisfactory rate performance (97.3 mAh g(-1) at 25 C). To our knowledge, such ultra long cycle life has not previously been reported.
机译：对锂离子电池具有类似的电化学反应机制的钠离子电池被认为是由于钠储量丰富的钠储量导致的最潜在的锂离子电池替代品之一。 然而，很难找到妨碍大半径的电极材料。 由于其合理的操作电压，成本和无毒性，TiO2作为钠离子电池的阳极特别有趣。 为了获得更好的电化学性质，通过具有随后的煅烧过程的可伸缩的水热 - 溶剂方法合成了介孔TiO2纳米片（NSS）/氧化物氧化物（RGO）复合材料。 从独特的结构设计中受益，TiO2 NSS @ rgo在20℃的高电流速率为10 000次循环后表现出优异的循环稳定性（90mAhg（-1）），并且令人满意的速率性能（97.3mAhg（-1）在25次 C）。 据我们所知，此前没有报道这种超长循环寿命。

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  • 来源
    《Nanotechnology》 |2018年第22期|共8页
  • 作者

    Zhang Ruifang; Wang Yuankun; Zhou Han; Lang Jinxin; Xu Jingjing; Xiang Yang; Ding Shujiang;

  • 作者单位

    Xi An Jiao Tong Univ State Key Lab Mech Behav Mat MOE Key Lab Nonequilibrium Synth &

    Modulat Conden Dept Appl Chem Sch Sci Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ State Key Lab Mech Behav Mat MOE Key Lab Nonequilibrium Synth &

    Modulat Conden Dept Appl Chem Sch Sci Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ State Key Lab Mech Behav Mat MOE Key Lab Nonequilibrium Synth &

    Modulat Conden Dept Appl Chem Sch Sci Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ State Key Lab Mech Behav Mat MOE Key Lab Nonequilibrium Synth &

    Modulat Conden Dept Appl Chem Sch Sci Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ State Key Lab Mech Behav Mat MOE Key Lab Nonequilibrium Synth &

    Modulat Conden Dept Appl Chem Sch Sci Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ State Key Lab Mech Behav Mat MOE Key Lab Nonequilibrium Synth &

    Modulat Conden Dept Appl Chem Sch Sci Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ State Key Lab Mech Behav Mat MOE Key Lab Nonequilibrium Synth &

    Modulat Conden Dept Appl Chem Sch Sci Xian 710049 Shaanxi Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    sodium-ion batteries; anatase TiO2; graphene; nanosheets; ultra long life;

    机译：钠离子电池;锐钛矿TiO2;石墨烯;纳米液;超长寿命;

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