Coordinatively Cross-Linked Binders for Silicon-Based Electrodes for Li-Ion Batteries: Beneficial Impact on Mechanical Properties and Electrochemical Performance

被引:2
作者
Huet, Lucas [1 ,2 ]
Mazouzi, Driss [3 ]
Moreau, Philippe [1 ]
Dupre, Nicolas [1 ]
Paris, Michael [1 ]
Mittelette, Sebastien [4 ]
Laurencin, Danielle [4 ]
Devic, Thomas [1 ]
Roue, Lionel [2 ]
Lestriez, Bernard [1 ]
机构
[1] Nantes Univ, CNRS, Inst Mat Nantes Jean Rouxel, IMN, F-44000 Nantes, France
[2] Inst Natl Rech Sci INRS, Ctr Energie, Mat, Telecommun EMT, Varennes, PQ J3X 1S2, Canada
[3] Univ Sidi Mohamed Ben Abdellah, Multidisciplinary Fac Taza, Mat Nat Subst Environm & Modeling Lab, Fes 1223, Morocco
[4] Univ Montpellier, CNRS, ICGM, ENSCM, F-34095 Montpellier, France
基金
加拿大自然科学与工程研究理事会;
关键词
Li-ion batteries; silicon-based negative electrode; ionic cross-linked binder; Zn-carboxylate bonds; mechanical properties; electrochemical performance; SODIUM CARBOXYMETHYL CELLULOSE; SI-BASED ANODES; CITRIC-ACID; NEGATIVE ELECTRODES; POLYMERIC BINDERS; COMPOSITE ELECTRODES; AQUEOUS-SOLUTIONS; HIGH-CAPACITY; ALGINATE; BEHAVIOR;
D O I
10.1021/acsami.3c00186
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A simple and versatile preparation of Zn(II)-poly(carboxylates) reticulated binders by the addition of Zn(II) precursors (ZnSO4, ZnO, or Zn(NO3)2) into a preoptimized poly(carboxylic acids) binder solution is proposed. These binders lead systematically to a significantly improved electrochemical performance when used for the formulation of silicon-based negative electrodes. The formation of carboxylate-Zn(II) coordination bonds formation is investigated by rheology and FTIR and NMR spectroscopies. Mechanical characterizations reveal that the coordinated binder offers a better electrode coating cohesion and adhesion to the current collector, as well as higher hardness and elastic modulus, which are even preserved in the presence of a carbonate solvent (i.e., in battery operation conditions). Ultimately, as shown from operando dilatometry experiments, the electrode expansion during lithiation is reduced, mitigating electrode mechanical failure. Such coordinatively reticulated electrodes outperform their uncoordinated counterparts with an improved capacity retention of over 30% after 60 cycles.
引用
收藏
页码:15509 / 15524
页数:16
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