Metal oxide- and metal-loaded mesoporous carbon for practical high-performance Li-ion battery anodes

材料科学 阳极 纳米材料 氧化物 纳米复合材料 电池(电) 法拉第效率 介孔材料 石墨 金属 纳米技术 纳米颗粒 氧化锡 电极 化学工程 复合材料 冶金 催化作用 化学 功率(物理) 物理化学 工程类 物理 量子力学 生物化学
作者
Ayman A. AbdelHamid,Adriana Mendoza‐Garcia,Su Seong Lee,Jackie Y. Ying
出处
期刊:Nano Energy [Elsevier BV]
卷期号:119: 109025-109025 被引量:15
标识
DOI:10.1016/j.nanoen.2023.109025
摘要

The rapidly expanding Li-ion battery market needs new materials that can satisfy the increasing energy storage demand. Metal oxides and some metals such as tin are viable alternatives to graphite as Li-ion battery anodes, but their low conductivity and large volume change during cycling impose severe challenges that need to be overcome. Confinement of metal oxide and metal nanomaterials within mesoporous carbon (MC) is an effective strategy in this regard, but complex synthesis and nanoparticle aggregation have hindered its application. Herein, we report a facile, scalable and generalized methodology for the room-temperature synthesis of metal oxide and metal nanoparticles within a MC host. The approach has been successfully applied to achieve uniform distribution and prevent aggregation of a large variety of metal oxide and metal nanomaterials in MC support. These nanocomposites were screened as Li-ion battery anodes, and the optimal candidates were shown to be superior to previously reported systems. Our synthesis method was scaled up using commercial MC. The nanocomposites were validated in a high-loading electrode (4 mg/cm2) with a practical voltage range (< 2 V vs. Li+/Li), impressive initial Coulombic efficiency (> 100%), and excellent stability (~ 500 mAh/g after 250 cycles at 0.2 A/g), which was 1.5–2x better than commercial graphite at the same testing conditions. The facile nature, universality and versatility of our approach make it possible to load various metal oxide and metal nanomaterials within different types of MC. These nanocomposites would be of significant interest to different fields, such as energy storage and conversion, sensing, and catalysis.
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