CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2022
·Vol. 50
·期 7
·100101
·
IF 1.193
Ranehipura Dewage Lahiru SANDARUWAN,Bo-Yu WANG,Suwanda Arachchige Don Rumesh MADHUSANKA,Shun-Chao MA,Hong-Yu WANG
Transition to aqueous electrode fabrication of lithium ion batteries (LIBs) with green binder is certainly profitable and imperative in terms of economic benefit and environmental wellness. However, aqueous processing of cathode in LIB, especially the ternary LiNi x Co y Mn z O 2 (NCM), is still problematic and novel water-soluble binder should be developed to boost the electrochemical performances of cathode. In this regard, commercially available white latex (WL), cooperating with CMC (carboxymethyl cellulose), is employed as water-processable binder mixture for manufacturing NCM cathode. Interestingly, the prepared NCM cathode assisted by WL/CMC mixture exhibits improved electrochemical performances including better initial reversible capacity of 161.7 mAh g −1 at 0.5 C current density, long-term cyclability with a reversible capacity of 155 mAh g −1 along with high-capacity retention of around 96% after cycling 200 times, and even excellent rate capability, which are superior to those of the conventional counterpart base on polyvinylidene fluoride (PVdF). Moreover, the NCM|graphite full cell, which is absolutely based on this novel WL binder, also demonstrates the outstanding electrochemical behaviors.
研究领域:
电化学
·
能源材料
·
锂电池技术
·
高分子材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Yanrong Wang,Hui Huang,Qingshui Xie,Yuanpeng Wang,Baihua Qu
Sodium-ion batteries (SIBs) have gained more and more interest for grid-level energy storage applications compared with current lithium-ion batteries (LIBs). In this paper, well-uniform and dispersed spindle-shaped NiCo 2 O 4 particles were synthesized by solvothermal method, and then graphene-encapsulated NiCo 2 O 4 (NiCo 2 O 4 @G) was formed core-shell nanostructures , which greatly enhanced the electronic and ionic (electro-active) conduction and also effectively buffering to accommodate the strain. Benefit from its structure feature, the prepared NiCo 2 O 4 @G core-shell nanostructures composite shows good cycling with a capacity of up to ∼400 mAh g −1 (100 mA g −1 ) in 100 cycles for NIBs anode. The facile synthesis process and excellent SIBs behaviors in this paper are expected to be extended in developing other anode materials in battery system.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2013
·
IF 3.777
Lili Chai,Qunting Qu,Longfei Zhang,Ming Shen,Li Zhang,Honghe Zheng
Chitosan was applied as the electrode binder material for a spherical graphite anode in lithium-ion batteries. Compared to using poly (vinylidene fluoride) (PVDF) binder, the graphite anode using chitosan exhibited enhanced electrochemical performances in terms of the first Columbic efficiency, rate capability and cycling behavior. With similar specific capacity, the first Columbic efficiency of the chitosan-based anode is 95.4% compared to 89.3% of the PVDF-based anode. After 200 charge–discharge cycles at 0.5 C , the capacity retention of the chitosan-based electrode showed to be significantly higher than that of the PVDF-based electrode. Electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) measurements were carried out to investigate the formation and evolution of the solid electrolyte interphase (SEI) formed on the graphite electrodes. The results show that a thin, homogenous and stable SEI layer is formed on the graphite electrode surface with chitosan binder compared with that using the conventional PVDF binder
研究领域:
电化学
·
材料科学
·
能源存储
·
电池技术
·
纳米材料
·
界面化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·Vol. 45
·期 8
·10633-10639
·
IF 3.45
Guorong Hu,Zhichen Xue,Zhongyuan Luo,Zhongdong Peng,Yanbing Cao,Weigang Wang,Yuexi Zeng,Yong Huang,Yong Tao,Tianfan Li,Zhiyong Zhang,Ke Du
The Li-rich cathode material for long cycle performance and long-term storage performance is a challenge for next-generation lithium-ion batteries due to the rapid capacity degradation over cycling and the formation of residual lithium on the surface during long-term storage. Herein, an elevated performance of Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 materials via CeO 2 inlay is reported, which was prepared from Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 by sol-gel inlay with CeO 2 . It was proved by scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy that cerium oxide cladding not only covered the surface of the material but also diffused into the interior of the material change crystal structure. Cerium oxide on the cladding not only reduces the material's contact with water and carbon dioxide in the air, but also prevents the material from being corroded by electrolyte during electrochemical test. The position of the transition metal atom is replaced Ce atoms, which increases the unit cell volume and the stability of the Li-rich material during the cycling. The results show that the storage property and the electrochemical cycling property of the material have been improved obviously. The CeO 2 inlaid lithium rich material discharged 204.6 mAh/g for the first time at the current of 1C, and 164.4 mAh/g after 150 charge and discharge cycles with corresponding capacity retention rate of 80.35%, compared with the retention rate of 57.26% for pristine Li-rich material capacity. After being stored in humid air for 40 days, the CeO 2 inlaid lithium-rich material showed better electrochemical performance than the pristine one. It is powerfully demonstrated that the CeO 2 inlay strategy here holds huge promise for surface modification of electrode materials for lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
锂离子电池
·
能源存储
·
无机非金属材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Jianwei Bai,Xiaofei Ma,Cen Gong,Yiming Chen,Huijun Yan,Kewei Wang,Jun Wang
Traditional adsorption resin prepared by a low efficiency method has a low porosity and surface area , which limits the adsorption performance of the resin. Therefore, a novel porous resin was developed by structural design of the resins through post- modification with HPA and a post-crosslinked method. The novel porous post-modification resin was successfully prepared by the multistep method. Meanwhile, the high surface area and abundant micropores in HCR-AO can improve the adsorption rate by accelerating the diffusion of uranium in the external diffusion stage. The removal capacity of HCR-AO increased 366% for HCR and 120% for PSD-AO at the same initial concentration. HCR-AO takes less time to reach equilibrium than PSD-AO and HCR. Excitingly, the adsorption amount of the material dropped only slightly even after 8 cycles. The short equilibrium time and outstanding removal efficiency makes it a novel candidate for further extraction of U (VI) from seawater .
研究领域:
环境化学
·
核化学
·
材料科学
·
吸附分离
·
海洋资源提取
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 16
·13384-13391
·
IF 3.289
Bin Lu,Renzong Hu,Jiangwen Liu,Jun Liu,Hui Wang,Min Zhu
To improve the coulombic efficiency (CE) and cycle life of SnO2 anode in lithium ion batteries, SnO2–Cu–graphite composites with dual scale embedding structure are synthesized by ball milling. The SnO2–Cu composite, in which SnO2 nanoparticles with grain size less than 10 nm are uniformly dispersed in inactive nanocrystalline Cu matrix, is firstly obtained by milling the mixture of SnO2 and Cu nanopowders (molar ratio 1 : 2), and then further milling with graphite (C) to obtain SnO2–Cu–C composite with microsized graphite sheets as matrix of SnO2–Cu composite. The 50 h-milled SnO2–Cu composite exhibits higher initial CE (76.0 ± 1.5%) and subsequent CE than 50 h-milled SnO2. Furthermore, the SnO2–Cu–C composite anode is capable of retaining a maximum charge capacity of 450.8 mA h g−1 at 100 mA g−1 after 80 cycles with a capacity retention ratio of 74.4%, displaying superior cyclic stability to as-milled SnO2, SnO2–Cu and SnO2–C composites. The improved CE and cycleability are attributed to the unique dual scale embedding structure that offers good conductivity of electron and lithium ion as well as the nanostructure stability of active materials. This unique composite structure might be extended to other high-capacity anode materials, to achieve high performance lithium ion batteries.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
锂离子电池
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2016
·
IF 2.437
Yan Fang,Xiaohong Jiang,Lihong Niu,Shujie Wang
Polypyrrole/aligned carbon nanotubes (PPy/ACNTs) core-shell nanotube arrays on metal foil have been fabricated through an electrochemical method. The as-prepared PPy/ACNTs electrode materials with novel nanostructure , which is very conducive to the transmission of electrons and ions, possess greatly improved electrochemical performance. The specific capacitances of PPy/ACNTs electrode materials can reach 505 F/g ( vs. the both mass of PPy and ACNTs) in three-electrode system. In two-electrode system, the specific capacitances of the PPy/ACNTs electrode materials can reach 456 F/g ( vs. the both mass of PPy and ACNTs). The PPy/ACNTs electrode materials also exhibit greatly improved rate capability and superior cycling performance.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 31
·18612-18618
·
IF 10.733
Shuo Wang,Xiaofu Xu,Xue Zhang,Chengzhou Xin,Bingqing Xu,Liangliang Li,Yuan-Hua Lin,Yang Shen,Baohua Li,Ce-Wen Nan
All-solid-state lithium-ion batteries (ASSLIBs) owing to their advantage of enhanced safety are considered to be a promising candidate for next-generation energy storage devices. However, the poor cycling performance and low areal capacities of ASSLIBs with S, Li2S or traditional oxide cathodes hinder the development of high-energy-density ASSLIBs. Herein, a Li6PS5Cl solid-state electrolyte has been systematically investigated for use as a cathode active material in ASSLIBs for the first time. ASSLIBs employing Li6PS5Cl as both the active material and electrolyte with a Li–In alloy anode are fabricated. A Li6PS5Cl-based cell with an active material loading of 3.1 mg cm−2 exhibits a high discharge capacity of around 535 mA h g−1 after 650 cycles at 56 mA g−1 (∼0.1C) at room temperature, which is the highest value among ASSLIBs using sulfide SSEs as active materials and is even comparable with those of cells with S, Li2S or transition metal sulfides as the active material. This superior long-term cycling performance is attributed to the highly reversible electrochemical activity of Li6PS5Cl revealed by ex situ XRD and XPS analyses.
研究领域:
电化学
·
能源材料
·
固态离子学
·
储能技术
·
材料科学
✓ 已验证
DOI
高影响因子
IONICS
·
2024
·Vol. 30
·期 6
·3111-3119
·
IF 2.4
Teng Zeyu,Wang Zhilong,Li Zhongcheng,Chen Kanghua
Silicon is a strong competitor for the anode of the next generation of lithium-ion batteries, and ball-milled silicon has broad prospects as a low-cost method for preparing nano silicon. In order to match ball-milled silicon, it is imperative to develop better bonding agents with lower costs. Through adding amino silane coupling agent, the performance of ball-milling silicon anode is enhanced. This study explored the network structure formed by amino silane coupling agent with different chain lengths and polyacrylic acids. Herein, the crosslinked network prepared with 3-[2-(2-aminoethyl amino) ethyl amino] propyl-trimethoxysilane as coupling agent had the best performance, and the initial discharge capacity of the silicon anode prepared by this binder reached 3297.4 mAh·g −1 at a constant current density of 0.5A·g −1 , the initial Coulomb efficiency reached 92.25%. After 100 cycles, the discharge capacity of anode was still maintained at 2229.5 mAh·g −1 with excellent charge/discharge performance.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
高分子化学
·
表面改性
✓ 已验证
DOI
高影响因子
IONICS
·
2016
·Vol. 22
·期 8
·1343-1351
·
IF 2.119
Li Qi-Ling,Xu Wang-Qiong,Bai Hong-Li,Guo Jun-Ming,Su Chang-Wei
ZnO-coated LiMn 2 O 4 cathode materials were prepared by a combustion method using glucose as fuel. The phase structures, size of particles, morphology, and electrochemical performance of pristine and ZnO-coated LiMn 2 O 4 powders are studied in detail by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), galvanostatic charge-discharge test, and X-ray photoelectron spectroscopy (XPS). XRD patterns indicated that surface-modified ZnO have no obvious effect on the bulk structure of the LiMn 2 O 4 . TEM and XPS proved ZnO formation on the surface of the LiMn 2 O 4 particles. Galvanostatic charge/discharge test and rate performance showed that the ZnO coating could improve the capacity and cycling performance of LiMn 2 O 4 . The 2 wt% ZnO-coated LiMn 2 O 4 sample exhibited an initial discharge capacity of 112.8 mAh g −1 with a capacity retention of 84.1 % after 500 cycles at 0.5 C. Besides, a good rate capability at different current densities from 0.5 to 5.0 C can be acquired. CV and EIS measurements showed that the ZnO coating effectively reduced the impacts of polarization and charge transfer resistance upon cycling.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
纳米材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yingjun Qiao,Yonggan Ran,Zhiqiang Qian,Bing Zhao,Chengpeng Li,Zhong Liu
The Mn dissolution issue in manganese-based materials (LMO) represents one of the most challenging barriers to further commercial development of electrochemical lithium extraction, which is an efficient and clean way of extracting Li from liquid resources. Here, by leveraging the advantages of composite materials, a novel combination of reduced graphene oxide (rGO) and sulfonated ionic polymers (Nafion) is introduced to relieve the issues of electrode polarization and manganese dissolution, critical factors limiting the durability of LMO electrodes. By modifying with rGO to enhance electronic conductivity and surface characteristics, and capturing dissolved Mn 2+ through Nafion, the modified electrode showed significant improvement in cycling stability and lithium adsorption capacity. Experimental results confirm that this synergistic approach effectively mitigates polarization effects and controls disproportionation reactions, thereby enhancing the stability of the lithium extraction process, revealing a notable increase in electrode capacity retention from 79.04 % to 94.64 % after 30 cycles. Additionally, through DFT calculations and XPS analysis, the effectiveness of the manganese capture strategy is validated. This work presents an effective new strategy to extend the lifespan of manganese-based electrodes and enhance their adsorption performance.
研究领域:
电化学
·
材料科学
·
能源化学
·
环境工程
·
无机化学
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2018
·
IF 2.751
Wenping Zha,Yinghui Xu,Fei Chen,Qiang Shen,Lianmeng Zhang
In this work, Li 7 La 3 Zr 2 O 12 (LLZO)-based membrane electrolyte, which has good flexibility and can be easily mass-produced, is proposed to address the intrinsic defects of ceramic electrolytes . The LLZO-based membrane electrolyte is electrochemically stable in the voltage range of 0–5.2 V vs. Li/Li + due to the good oxidative stability of LLZO. We also develop a simple and low-cost approach to fabricate the all-solid-state lithium battery (ASSLB). Wet coating and hot pressing are applied to form a continuous and homogeneous electrolyte layer on a cathode layer. Thanks to the integrated preparation process, there is no obvious interface between the cathode layer and the electrolyte layer, hence reducing the interface resistance. The Li/LiFePO 4 batteries exhibit desirable cycling performance at 60 °C, which deliver a maximum discharge specific capacity of 151.6 mAh·g −1 at 0.1C and maintain 97.8% of the capacity after 50 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态离子学
·
先进电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）