1
|
Sun Z, Zhu J, Yang C, Xie Q, Jiang Y, Wang K, Jiang M. N-Type Polyoxadiazole Conductive Polymer Binders Derived High-Performance Silicon Anodes Enabled by Crosslinking Metal Cations. ACS APPLIED MATERIALS & INTERFACES 2023; 15:12946-12956. [PMID: 36862122 DOI: 10.1021/acsami.2c19587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The dilemma of employing high-capacity battery materials and maintaining the electrodes' electrical and mechanical integrity requires a unique binder system design. Polyoxadiazole (POD) is an n-type conductive polymer with excellent electronic and ionic conductive properties, which has acted as a silicon binder to achieve high specific capacity and rate performance. However, due to its linear structure, it cannot effectively alleviate the enormous volume change of silicon during the process of lithiation/delithiation, resulting in poor cycle stability. This paper systematically studied metal ion (i.e., Li+, Na+, Mg2+, Ca2+, and Sr2+)-crosslinked PODs as silicon anode binders. The results show that the ionic radius and valence state remarkably influence the polymer's mechanical properties and the electrolyte's infiltration. Electrochemical methods have thoroughly explored the effects of different ion crosslinks on the ionic and electronic conductivity of POD in the intrinsic and n-doped states. Attributed to the excellent mechanical strength and good elasticity, Ca-POD can better maintain the overall integrity of the electrode structure and conductive network, significantly improving the cycling stability of the silicon anode. The cell with such binders still retains a capacity of 1770.1 mA h g-1 after 100 cycles at 0.2 C, which is ∼285% that of the cell with the PAALi binder (620.6 mA h g-1). This novel strategy using metal-ion crosslinking polymer binders and the unique experimental design provides a new pathway of high-performance binders for next-generation rechargeable batteries.
Collapse
Affiliation(s)
- Zhaomei Sun
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
- State Key Laboratory of Polymer Materials Engineering, Chengdu 610065, China
| | - Jiadeng Zhu
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Smart Devices and Printed Electronics Foundry, Brewer Science Inc., Springfield, Missouri 65806, United States
| | - Chen Yang
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
- State Key Laboratory of Polymer Materials Engineering, Chengdu 610065, China
| | - Qibao Xie
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
- State Key Laboratory of Polymer Materials Engineering, Chengdu 610065, China
| | - Yan Jiang
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
- State Key Laboratory of Polymer Materials Engineering, Chengdu 610065, China
| | - Kaixiang Wang
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
- State Key Laboratory of Polymer Materials Engineering, Chengdu 610065, China
| | - Mengjin Jiang
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
- State Key Laboratory of Polymer Materials Engineering, Chengdu 610065, China
| |
Collapse
|
2
|
Geng Z, Liang S, Sun M, Liu C, He N, Yang X, Cui X, Fan W, Wang X, Huo Y. High-Performance, Free-Standing Symmetric Hybrid Membranes for Osmotic Separation. ACS APPLIED MATERIALS & INTERFACES 2021; 13:8967-8975. [PMID: 33576595 DOI: 10.1021/acsami.0c22124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The internal concentration polarization (ICP) of asymmetric osmotic membranes with support layers greatly reduced membrane water permeability, therefore compromising membrane performance. In this study, a series of free-standing symmetric hybrid forward osmosis (FO) membranes without experiencing ICP were fabricated by covalently linking metal-organic framework (MOF) nanofillers with a polymer matrix. Owing to the introduction of MOFs, which allow only water permeation but reject salts by steric hindrance, the prepared hybrid membranes could approach the empirical permeability-selectivity trade-off. The optimized hybrid membrane displayed an outstanding water/Na2SO4 selectivity of ∼1208.4 L mol-1, compared with that of conventional membranes of ∼375.6 L mol-1. Additionally, the fabricated hybrid membranes showed excellent mechanical robustness, maintaining structural integrity during the long-term FO separation of high-salinity solution. This work provides an effective methodology to fabricate high-performance, symmetric MOF-based membranes for osmotic separation processes such as seawater desalination and water purification.
Collapse
Affiliation(s)
- Zhi Geng
- College of Environment, Research Centre for Municipal Wastewater Treatment and Water Quality Protection, Northeast Normal University, Changchun 130117, China
| | - Shiqiang Liang
- College of Environment, Research Centre for Municipal Wastewater Treatment and Water Quality Protection, Northeast Normal University, Changchun 130117, China
| | - Meng Sun
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
| | - Chuhan Liu
- College of Environment, Research Centre for Municipal Wastewater Treatment and Water Quality Protection, Northeast Normal University, Changchun 130117, China
| | - Nan He
- College of Environment, Research Centre for Municipal Wastewater Treatment and Water Quality Protection, Northeast Normal University, Changchun 130117, China
| | - Xia Yang
- College of Environment, Research Centre for Municipal Wastewater Treatment and Water Quality Protection, Northeast Normal University, Changchun 130117, China
| | - Xiaochun Cui
- College of Environment, Research Centre for Municipal Wastewater Treatment and Water Quality Protection, Northeast Normal University, Changchun 130117, China
| | - Wei Fan
- College of Environment, Research Centre for Municipal Wastewater Treatment and Water Quality Protection, Northeast Normal University, Changchun 130117, China
| | - Xianze Wang
- College of Environment, Research Centre for Municipal Wastewater Treatment and Water Quality Protection, Northeast Normal University, Changchun 130117, China
| | - Yang Huo
- College of Environment, Research Centre for Municipal Wastewater Treatment and Water Quality Protection, Northeast Normal University, Changchun 130117, China
| |
Collapse
|