1
|
Guo M, Zhang H, Huang Z, Li W, Zhang D, Gao C, Gao F, He P, Wang J, Chen W, Chen X, Terrones M, Wang Y. Liquid Template Assisted Activation for "Egg Puff"-Like Hard Carbon toward High Sodium Storage Performance. Small 2023; 19:e2302583. [PMID: 37236201 DOI: 10.1002/smll.202302583] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 05/10/2023] [Indexed: 05/28/2023]
Abstract
The slow solid diffusion dynamics of sodium ions and the side-reaction of sodium metal plating at low potential in the hard carbon anode of sodium ion batteries (SIBs) pose significant challenges to the safety manipulation of high-rate batteries. Herein, a simple yet powerful fabricating method is reported on for "egg puff"-like hard carbon with few N doping using rosin as a precursor via liquid salt template-assisted and potassium hydroxide dual activation. The as-synthesized hard carbon delivers promising electrochemical properties in the ether-based electrolyte especially at high rates, based on the absorption mechanism of fast charge transfer. The optimized hard carbon exhibits a high specific capacity of 367 mAh g-1 at 0.05 A g-1 and 92.9% initial coulombic efficiency (ICE), 183 mAh g-1 at 10 A g-1 , and ultra-long cycle stability of reversible discharge capacity of 151 mAh g-1 after 12,000 cycles at 5 A g-1 with the average coulombic efficiency of ≈99% and the decay of 0.0026% per cycle. These studies will undoubtedly provide an effective and practical strategy for advanced hard carbon anode of SIBs based on adsorption mechanism.
Collapse
Affiliation(s)
- Mingyi Guo
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Hao Zhang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Zheng Huang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Wenbin Li
- College of Chemistry & Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, China
| | - Dingyue Zhang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Caiqing Gao
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Fan Gao
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Ping He
- China Carbon Black Institute, Zigong, 643000, China
| | - Jiagui Wang
- China Carbon Black Institute, Zigong, 643000, China
| | - Weihua Chen
- College of Chemistry & Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, China
| | - Xianchun Chen
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Mauricio Terrones
- Department of Physics, Department of Chemistry, Department of Materials Science and Engineering and Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Yanqing Wang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| |
Collapse
|
2
|
Zhang H, Zhang D, Guo M, Huang Z, Wang X, Gao C, Gao F, Terrones M, Wang Y. Combustion Activation Induced Solid-State Synthesis for N, B Co-Doped Carbon/Zinc Borate Anode with a Boosting of Sodium Storage Performance. Adv Sci (Weinh) 2023; 10:e2207751. [PMID: 36938864 DOI: 10.1002/advs.202207751] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/02/2023] [Indexed: 05/18/2023]
Abstract
Zinc borates have merits of low voltage polarization and suitable redox potential, but usually suffer from low rate capability and poor cycling life, as an emerging anode candidate for Na+ storage. Here, a new intercalator-guided synthesis strategy is reported to simultaneously improve rate capability and stabilize cycling life of N, B co-doped carbon/zinc borates (CBZG). The strategy relies on a uniform dispersion of precursors and simultaneously stimulated combustion activation and solid-state reactions capable of scalable preparation. The Na+ storage mechanism of CBZG is studied: 1) ex situ XRD and XPS demonstrate two-step reaction sequence of Na+ storage: Zn6 O(OH)(BO3 )3 +Na+ +e- ↔3ZnO+Zn3 B2 O6 +NaBO2 +0.5H2 ①, Zn3 B2 O6 +6Na+ +6e- ↔3Zn+3Na2 O+B2 O3 ②; reaction ① is irreversible in ether-based electrolyte while reversible in ester-based electrolyte. 2) Electrochemical kinetics reveal that ether-based electrolyte possesses faster Na+ storage than ester-based electrolyte. The composite demonstrates an excellent capacity of 437.4 mAh g-1 in a half-cell, together with application potential in full cells (discharge capacity of 440.1 mAh g-1 and stable cycle performance of 2000 cycles at 5 A g-1 ). These studies will undoubtedly provide an avenue for developing novel synthetic methods of carbon-based borates and give new insights into the mechanism of Na+ storage in ether-based electrolyte for the desirable sodium storage.
Collapse
Affiliation(s)
- Hao Zhang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Dingyue Zhang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Mingyi Guo
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Zheng Huang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Xu Wang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Caiqin Gao
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Fan Gao
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Mauricio Terrones
- Department of Physics, Department of Chemistry, Department of Materials Science and Engineering and Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Yanqing Wang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| |
Collapse
|
3
|
Guo M, Cao Z, Liu Y, Ni Y, Chen X, Terrones M, Wang Y. Preparation of Tough, Binder-Free, and Self-Supporting LiFePO 4 Cathode by Using Mono-Dispersed Ultra-Long Single-Walled Carbon Nanotubes for High-Rate Performance Li-Ion Battery. Adv Sci (Weinh) 2023; 10:e2207355. [PMID: 36905241 PMCID: PMC10161069 DOI: 10.1002/advs.202207355] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/31/2023] [Indexed: 05/06/2023]
Abstract
Low-contents/absence of non-electrochemical activity binders, conductive additives, and current collectors are a concern for improving lithium-ion batteries' fast charging/discharging performance and developing free-standing electrodes in the aspects of flexible/wearable electronic devices. Herein, a simple yet powerful fabricating method for the massive production of mono-dispersed ultra-long single-walled carbon nanotubes (SWCNTs) in N-methyl-2-pyrrolidone solution, benefiting from the electrostatic dipole interaction and steric hindrance of dispersant molecules, is reported. These SWCNTs form a highly efficient conductive network to firmly fix LiFePO4 (LFP) particles in the electrode at low contents of 0.5 wt% as conductive additives. The binder-free LFP/SWCNT cathode delivers a superior rate capacity of 161.5 mAh g-1 at 0.5 C and 130.2 mAh g-1 at 5 C, with a high-rate capacity retention of 87.4% after 200 cycles at 2 C. The self-supporting LFP/SWCNT cathode shows excellent mechanical properties, which can withstand at least 7.2 MPa stress and 5% strain, allowing the fabrication of high mass loading electrodes with thicknesses up to 39.1 mg cm-2 . Such self-supporting electrodes display conductivities up to 1197 S m-1 and low charge-transfer resistance of 40.53 Ω, allowing fast charge delivery and enabling near-theoretical specific capacities.
Collapse
Affiliation(s)
- Mingyi Guo
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Zengqiang Cao
- School of Physical Science and Technology, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Yukang Liu
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Yuxiang Ni
- School of Physical Science and Technology, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Xianchun Chen
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Mauricio Terrones
- Department of Physics, Department of Chemistry, Department of Materials Science and Engineering and Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Yanqing Wang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, P. R. China
| |
Collapse
|