Porous Zn2Ti3O8@C rods via in situ carbon coating for superior lithium storage capability

IF 2.4 4区化学 Q3 CHEMISTRY, PHYSICAL

Ionics Pub Date : 2025-01-17 DOI:10.1007/s11581-024-06054-7

Fei-Long Li, Meng-Cheng Han, Guo-Chen Bian, Konglin Wu

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引用次数: 0

Abstract

In situ carbon-coated Zn₂Ti₃O₈ (Zn₂Ti₃O₈@C) porous 1D rods were constructed by using only the residual ethylene glycol and polyvinylpyrrolidone from the raw materials as carbon source precursors under a nitrogen atmosphere. This modification resulted in the transformation of the irregular morphology of Zn₂Ti₃O₈ observed during air calcination into longer rod-like structures. The carbon coating of the rods effectively reduced charge transfer resistance and enhanced the Li⁺ diffusion coefficient of Zn₂Ti₃O₈, leading to improved electrochemical performance. Moreover, this morphological transformation induced significant pseudocapacitive behavior, greatly enhancing the rate capability, cycling stability, and reversible capacity of Zn₂Ti₃O₈. Compared to pure Zn₂Ti₃O₈, the Zn₂Ti₃O₈@C composite exhibited the better electrochemical properties with higher lithium/delithium capacities of 488.8 mAh g⁻¹ (491.3 mAh g⁻¹) at 100 mA g⁻¹ after 180 cycles. These results highlight the effectiveness of the in situ carbon-coating strategy in producing high-performance electrode materials for lithium-ion batteries.

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来源期刊

Ionics 化学-电化学

CiteScore

5.30

自引率

7.10%

发文量

427

审稿时长

2.2 months

期刊介绍： Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.