Hybrid Anodes of Lithium Titanium Oxide and Carbon Onions for Lithium‐Ion and Sodium‐Ion Energy Storage,Energy Technology

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Hybrid Anodes of Lithium Titanium Oxide and Carbon Onions for Lithium‐Ion and Sodium‐Ion Energy Storage
Energy Technology ( IF 3.6 ) Pub Date : 2020-09-02 , DOI: 10.1002/ente.202000679
Hwirim Shim _{1,

2} , Stefanie Arnold _{1,

2} , Öznil Budak _{1,

2} , Maike Ulbricht _{1,

2} , Pattarachai Srimuk ₁ , Volker Presser _{1,

2}

Affiliation

This study demonstrates the hybridization of Li₄Ti₅O₁₂ (LTO) with different types of carbon onions synthesized from nanodiamonds. The carbon onions mixed with a Li₄Ti₅O_x precursor for sol–gel synthesis. These hybrid materials are tested as anodes for both lithium‐ion battery (LIB) and sodium‐ion battery (SIB). Electrochemical characterization for LIB application is carried out using 1 m LiPF₆ in a 1:1 (by volume) ethylene carbonate and dimethyl carbonate as the electrolyte. For lithium‐ion intercalation, LTO hybridized with carbon onions from the inert‐gas route achieves an excellent electrochemical performance of 188 mAh g⁻¹ at 10 mA g⁻¹, which maintains 100 mAh g⁻¹ at 1 A g⁻¹ and has a cycling stability of 96% of initial capacity after 400 cycles, thereby outperforming both neat LTO and LTO with onions obtained via vacuum treatment. The performance of the best‐performing hybrid material (LTO with carbon onions from argon annealing) in an SIB is tested, using 1 m NaClO₄ in ethylene/dimethyl/fluoroethylene carbonate (19:19:2 by mass) as the electrolyte. A maximum capacity of 102 mAh g⁻¹ for the SIB system is obtained, with a capacity retention of 96% after 500 cycles.

中文翻译：

锂钛氧化物和碳洋葱混合阳极，用于锂离子和钠离子能量存储

这项研究证明了Li ₄ Ti ₅ O ₁₂（LTO）与由纳米金刚石合成的不同类型的碳洋葱的杂交。碳洋葱与Li ₄ Ti ₅ O _x前体混合，用于溶胶-凝胶合成。这些混合材料经过测试，可作为锂离子电池（LIB）和钠离子电池（SIB）的阳极。使用1m LiPF ₆在1：1（体积）碳酸亚乙酯和碳酸二甲酯作为电解质中进行LIB的电化学表征。对于锂离子嵌入，LTO与惰性气体路线中的碳洋葱杂交获得了188 mAh g的出色电化学性能^-1以10mA克^-1，它保持为100mAh克^-1 1个A G ^-1，并具有400个循环后的初期容量96％的循环稳定性，从而既优于整齐LTO和LTO经由真空处理得到葱。使用1 m NaClO ₄在乙烯/二甲基/氟代碳酸亚乙酯（质量比为19：19：2）中的电解质，测试了性能最佳的混合材料（LTO和氩气退火中的碳洋葱组成的LTO ）的性能。SIB系统的最大容量为102 mAh g ^-1，在500次循环后，容量保留率为96％。

更新日期：2020-11-06

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