Colloidal TiO₂ solid spheres as high-performance anodes for Lithium-ion batteries: Synthesis, characterization, and optimization

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2024-11-19 DOI:10.1016/j.materresbull.2024.113221

Basharat Hussain , Abid Ullah , Wasim Abbas , Shahbaz Ahmad , Mehmet Egilmez , P. Rosaiah , Yusuf Siraj Usmani , Tensangmu Lama Tamang , Iftikhar Hussain

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Abstract

Anatase phase TiO₂ nanoparticles were successfully synthesized by annealing amorphous colloidal TiO₂ spheres. The colloidal TiO₂ nanoparticles exhibited enhanced specific discharge capacities ∼296 (0.1C), 185 (1C), 127 (2C), 101 (5C) and 82 mAh g^-1 (10C) in contrast to their amorphous counterparts ∼182 (0.1C), 119 (1C), 81 (2 C), 43 (5 C) and 18 mAh g^-1 (∼10C rates). Amorphous TiO₂ nanoparticles developed a layer of solid electrolyte interface (SEI) comprising lithium carbonate, lithium alkyl carbonates, and organic phosphates, leading to heightened intrinsic resistance of cells and diminished performance in terms of rate and cycling. Conversely, annealing at high temperatures effectively eliminates chemisorbed water and hydroxyl groups, resulting in improved stability under varying rates and during cycling for lithium-ion batteries based on titanium dioxide. The annealed colloidal TiO₂ demonstrated notably elevated specific discharge capacities and capacity retention of 93.5 % compared to amorphous titanium dioxide spheres of 42.1 %.

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作为锂离子电池高性能阳极的胶体 TiO₂固态球：合成、表征和优化

通过对无定形胶体二氧化钛球进行退火处理，成功合成了非晶相二氧化钛纳米粒子。胶体二氧化钛纳米粒子的比放电容量分别为 296（0.1C）、185（1C）、127（2C）、101（5C）和 82 mAh g-1（10C），而非晶态纳米粒子的比放电容量分别为 182（0.1C）、119（1C）、81（2C）、43（5C）和 18 mAh g-1（∼10C速率）。无定形二氧化钛纳米粒子形成了一层由碳酸锂、烷基碳酸锂和有机磷酸盐组成的固体电解质界面（SEI），导致电池的内在电阻增加，并降低了电池的速率和循环性能。相反，高温退火可有效消除化学吸附水和羟基，从而提高基于二氧化钛的锂离子电池在不同速率和循环过程中的稳定性。与无定形二氧化钛球的 42.1% 相比，退火胶体二氧化钛的比放电容量和容量保持率显著提高，达到 93.5%。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.