阳极
材料科学
硅
体积热力学
化学工程
锂(药物)
乙二胺四乙酸
光伏系统
纳米技术
冶金
螯合作用
工程类
化学
电极
物理
物理化学
医学
生态学
量子力学
生物
内分泌学
作者
Shuo‐Qing Zhang,Xin Xu,Jinchun Tu,Fengyang Chen,Jian Xie,Tiejun Zhu,Xinbing Zhao
标识
DOI:10.1016/j.mtsust.2022.100178
摘要
Although silicon is regarded as the appealing anode for next-generation lithium-ion batteries (LIBs) due to its high specific capacity, its practical application is still hindered by large volume expansion upon lithiation. To tackle the issue, novel binders have been developed in recent years. Herein, we construct a three-dimensional cross-linked binder by forming hydrogen bonds between carboxymethyl cellulose (CMC) and ethylenediaminetetraacetic acid disodium (EDTA-2Na) with EDTA-2Na further coordinated to calcium ions (Ca2+). Compared with the bare CMC binder, the cross-linked CMC/EDTA-Ca2+ binder exhibits a better mechanical property and higher adhesion strength, which enables reversible volume change and improves the cycling performance of Si/C anode (80.7% retention after 380 cycles at 1 A g−1). Meanwhile, low-cost and abundant photovoltaic waste silicon was recycled as Si source to fabricate Si/C anode. This work provides a sustainable route to fabricate Si anode by recycling photovoltaic Si and a practical method to stabilize Si anode by constructing a cross-linked binder.
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