Sodium ion batteries (SIBs) have drawn considerable research attention in energy storage systems due to its low cost and the abundance of sodium resource. However, it is still a big challenge to develop advanced anode materials to achieve high-performance SIBs. In this work, we developed porous lithium titanate (Li 4 Ti 5 O 12 ) nanosheets by a simple surfactant-regulating hydrothermal method followed by a calcinating process and used as an anode for SIBs. We investigated the effect of hexadecyl trimethyl ammonium bromide (CTAB) on the morphology and electrochemical properties of Li 4 Ti 5 O 12 in detail and found that the samples regulated by suitable content of CTAB in the synthesis process have a more regular structure and better electrochemical performance. The optimized sample showed high reversible capacities of 158.9 mAh g −1 and 123.2 mAh g −1 at 0.1 A g −1 and 0.5 A g −1 , respectively. The superior electrochemical performance may be originated from the unique porous nanosheet structure, which greatly decreases the charge transfer resistance, shortens the ion diffusion path and offers more active sites for sodium storage.

中文翻译：

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多孔钛酸锂纳米片作为钠离子电池的先进负极材料

钠离子电池（SIBs）由于其低成本和丰富的钠资源而在储能系统中引起了广泛的研究关注。然而，开发先进的负极材料以实现高性能的SIBs仍然是一个巨大的挑战。在这项工作中，我们通过简单的表面活性剂调节水热法和煅烧工艺开发了多孔钛酸锂 (Li 4 Ti 5 O 12 ) 纳米片，并用作 SIBs 的阳极。我们详细研究了十六烷基三甲基溴化铵 (CTAB) 对 Li 4 Ti 5 O 12 形貌和电化学性能的影响，发现在合成过程中通过合适的 CTAB 含量调节的样品具有更规则的结构和更好的电化学性能。表现。优化后的样品显示出 158.9 mAh g -1 和 123 的高可逆容量。2 mAh g -1 分别为0.1 A g -1 和0.5 A g -1 。优异的电化学性能可能源于独特的多孔纳米片结构，大大降低了电荷转移阻力，缩短了离子扩散路径，并为钠储存提供了更多的活性位点。