NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 31
·15016-15023
·
IF 3.925
Yayue He,Youjia Zhang,Zhenxi Li,Peng-Fei Cao,Huabin Yang,Shilun Gao
As a promising anode material for next-generation high-energy density lithium-ion batteries (LIBs), one of the main technical issues for silicon (Si) electrodes is the low initial Coulombic efficiency (ICE). By a pre-lithiation process, preparation of lithium–silicon (Li–Si) alloy electrodes can efficiently improve the ICE, thus leading to excellent electrochemical performance. Herein, with solid wastes as precursors, we report a cost-efficient approach for the fabrication of Li3.25Si anode materials via simple magnesiothermic reduction and then mechanical alloy reaction methods, combining the advantages of low-cost and high ICE. The prepared Li3.25Si@acetylene black (Li3.25Si@A) electrode exhibits excellent electrochemical performance with a high reversible capacity of 1138.9 mA h g−1 over 90 cycles at a current density of 100 mA g−1 and its ICE is as high as 107.7%, which is superior to that of the commercial Li3.25Si@A electrode. With a simple and low-cost manufacturing process and high ICE, the fabrication process will be definitely meaningful in achieving low-cost and high-capacity anode materials with a prolonged cycle life.
研究领域:
材料科学
·
电化学
·
能源存储
·
可持续材料
·
电池技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 86
·70527-70535
·
IF 3.84
Kaina Shang,Wentao Li,Yongmei Liu,Wenguang Zhang,Hui Yang,Jiqing Xie,Zuyan Liu,Shu-Lei Chou,Lingzhi Zhao,Ronghua Zeng
We report the synthesis of a novel shuttle-like Fe3O4–Co3O4 self-assembling architecture through a facile hydrothermal method. The composite manifests quite excellent electrochemical performance as anodes of Li-ion batteries. It delivers a high reversible capacity of ∼1013 mA h g−1 at 100 mA g−1 after 100 cycles (∼1246 mA h g−1 at 0.5 A g−1, 864 mA h g−1 at 1 A g−1 and 625 mA h g−1 at 2 A g−1 after 50 cycles). The rate performance is also outstanding with a reversible capacity of 660 mA h g−1 even at 5 A g−1 and a capacity retention of 94% after 78 cycles. The synergetic effect of Co3O4 and Fe3O4, as well as the unique self-assembling architecture, may be responsible for the large enhanced electrochemical performance.
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
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Peng Zhang,Han Jin,Tong Wang,Miao Wang
The highly concentrated lithium bis(fluorosulfonyl)imide/1,2–dimethoxyethane electrolyte is in the good graces of researchers due to its excellent electrochemical performance in lithium-metal batteries. However, our study reveals that the more concentrated electrolyte incurred more drastic lithium-dendrite growth. Minimum onset time (t sc ) of lithium-dendrite formation of only 7.4 and 18.6 h are observed in 4 M lithium bis(fluorosulfonyl)imide/1,2-dimethoxyethane electrolyte galvanostatically polarized at current densities of 1.0 and 0.5 mA cm −2 , respectively. In contrast, t sc are as long as around 56 and > 190 h in 1 M electrolyte at 1.0 and 0.5 mA cm −2 , respectively. We found that 1 M electrolyte has comprehensive advantages in many respects, including Li + transference number (0.61), salt diffusion coefficient (1.47 × 10 −5 cm 2 s −1 ), ionic conductivity (1.52 × 10 −2 S cm −1 ), low polarization potential and solid electrolyte interphase protection, which collectively make contributions to outstanding lithium-dendrite suppression.
研究领域:
电化学
·
材料科学
·
能源存储
·
电池技术
·
界面化学
✓ 已验证
DOI
高影响因子
IONICS
·
2016
·Vol. 23
·期 3
·575-583
·
IF 2.119
He Zhangxing,Jiang Yifan,Sun Dan,Dai Lei,Wang Haiyan
Inferior rate capability is a big challenge for LiTi 2 (PO 4 ) 3 anode for aqueous lithium-ion batteries. Herein, to address such issue, we synthesized a high-performance LiTi 2 (PO 4 ) 3 /carbon/carbon nanotube (LTP/C/CNT) composite by virtue of high-quality carbon coating and incorporation of good conductive network. The as-prepared LTP/C/CNT composite exhibits excellent rate performance with discharge capacity of 80.1 and 59.1 mAh g −1 at 10 C and 20 C (based on the mass of anode, 1 C = 150 mA g −1 ), much larger than that of the LTP/C composite (53.4 mAh g −1 at 10 C, and 31.7 mAh g −1 at 20 C). LTP/C/CNT also demonstrates outstanding cycling stability with capacity retention of 83.3 % after 1000 cycles at 5 C, superior to LTP/C without incorporation of CNTs (60.1 %). As verified, the excellent electrochemical performance of the LTP/C/CNT composite is attributed to the enhanced electrical conductivity, rapid charge transfer, and Li-ion diffusion because of the incorporation of CNTs.
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
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Changfei Zou,Li Yang,Kaili Luo,Lei Liu,Xiyuan Tao,Lingguang Yi,Xianhu Liu,Zhigao Luo,Xianyou Wang
Composite polymer electrolytes (CPEs), which are made up of sulfide solid electrolyte Li 6 PS 5 Cl dispersed in solid polymer electrolytes (SPEs) based on the poly (ethylene oxide) (PEO), has been prepared by adopting solution casting method. The results show that the addition of appropriate amount of Li 6 PS 5 Cl can enhance lithium-ion conductivity and interfacial stability of solid polymer electrolyte, which can play an active role in the electrochemical properties of the improving all-solid-state LiFePO 4 /Li batteries. Especially, the PEO-1 wt% Li 6 PS 5 Cl exhibits a high lithium-ion conductivity of 8.84 × 10 −4 S/cm at 80 ℃ and 7.58 × 10 −5 S/cm at 30 ℃. Compared with the SPE, the PEO-1 wt% Li 6 PS 5 Cl has smaller interfacial impedance and more stable interface with lithium metal. Therefore, all-solid-state LiFePO 4 /Li batteries assembled by the PEO-1 wt% Li 6 PS 5 Cl represent higher coulomb efficiency, and better cycle stability with high initial discharge capacity of 155.43 mAh/g, 134.95 mAh/g at current rates of 0.2C, 0.5C at 60 ℃, respectively.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
固态离子学
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Ailing Hwang,Yulin Ma,Yi Cao,Qin Li,Long Wang,Xinqun Cheng,Pengjian Zuo,Chunyu Du,Yunzhi Gao,Geping Yin
Li 6 PS 5 Cl-coated Li 4 Ti 5 O 12 materials was fabricated by a simple liquid-phase treatment method. Charge-discharge tests show that Li 6 PS 5 Cl-coated Li 4 Ti 5 O 12 (LTO@LPSCl)/Li 6 PS 5 Cl/Li all-solid-state lithium batteries exhibit high reversible capacity (~158 mA h·g -1 ) after 250 cycles under 0.05 C and excellent rate capacity (~50 mA h·g -1 ) under 1 C at 80 °C .A combination of scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) mapping, and electrochemical impedance spectra (EIS) reveals that good wettability of liquid with Li 4 Ti 5 O 12 materials and Li 6 PS 5 Cl is responsible for Li 6 PS 5 Cl nanoparticle coated on the surface of Li 4 Ti 5 O 12 materials homogenously, which build the stable interface between active materials and solid state electrolyte, reduce the interface resistance effectively, and result in excellent electrochemical performances.
研究领域:
材料科学
·
电化学
·
固态离子学
·
能源存储
·
纳米材料
✓ 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
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Fengrui Zhang,Yiyang Sun,Zhicheng Wang,Daosong Fu,Jing Li,Jianchen Hu,Jingjing Xu,Xiaodong Wu
High-energy density solid-state lithium metal batteries are expected to become the next generation of energy storage devices. Polymeric ionic liquid-based solid polymer electrolytes (PIL-based SPEs) are an attractive choice among electrolytes, but their ionic conductivities are generally insufficient due to numerous crystallized polymer regions. To achieve higher conductivity, we use facile copolymerization of an ionic liquid (IL) monomer and poly(ethylene glycol) diacrylate monomer to obtain in situ plasticized polymer chains. The resultant PIL-based SPE exhibits decreased crystallinity, a lower glass-transition temperature, and improved ionic conductivity (1.4 × 10–4 S cm–1 at 30 °C). A solid-state LiFePO4 (LFP)|Li battery based on the SPE displays a high reversible specific capacity of 140 mA h g–1 at 0.2C at 25 °C and excellent cycling stability, accompanying high Coulombic efficiency of approximately 100%. The in situ plasticized PIL-based SPE is significant in developing solid-state Li metal battery systems.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·Vol. 12
·期 5
·114091
·
IF 7.4
Xiaolong Dai,Tiangui Qi,Xiaobin Li,Zhihong Peng,Guihua Liu,Qiusheng Zhou,Yilin Wang,Leiting Shen
In recent years, lithium iron phosphate (LFP) batteries have been widely used in the electric vehicle industry. The recycling of spent LFP will be propitious to conserving resources and alleviating the environmental risks it poses. In this study, a selective extraction method for lithium from spent LFP was proposed using nitric acid . Lithium leached into the liquid phase, while P and Fe remained in the leaching residue. Under the conditions of 120°C, HNO 3 /Li molar ratio of 2, and time of 2 h, the leaching efficiency of lithium reached 99.5 %, with a selectivity reaching 82.1 %. Initially, LFP was decomposed to liberate Li, Fe, and P in the liquid phase. Subsequently, ferrous ions were oxidized to trivalent, high-valent iron ions re-precipitated as FePO 4 ·2 H 2 O. Thermodynamic calculations indicate that the temperature and pH value of the extraction system have significant influence on both the oxidation and reprecipitation steps. An imbalance of Fe/P ratio (<1) in the raw material hinders the selectivity of lithium extraction , and supplementing this portion of Fe can enhance the selectivity to over 90 %. Additionally, LiCO 3 and anhydrous FePO 4 were effectively regenerated from the leachate and residue. This study provides a novel approach for the recycling of spent LFP and probably contributes to the sustainability of the lithium ion battery industry.
研究领域:
环境科学
·
冶金工程
·
材料回收
·
可持续能源
·
化学工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·Vol. 43
·期 12
·9327-9333
·
IF 2.986
Nan Zhou,Shengxiong Huang,Tao Hong,Wei Luo,Yun Tian,Xiangyang Lu,Zhi Zhou
In this paper, LiTi 2 (PO 4 ) 3 @carbon composite as anode for aqueous lithium ion battery has been successfully synthesized by in-situ carbon coating method using oxalic acid and glucose as double carbon sources. XRD results confirm the rhombohedral NASICON-type LiTi 2 (PO 4 ) 3 structure of the as-prepared composite. The LiTi 2 (PO 4 ) 3 @carbon composite using double carbon sources (LTP-OG-10) disperses well, and the coated carbon layer has the appropriate thickness of 3–7 nm, which result in proper balance of the good electrical conductivity and the fast kinetics of diffusion of lithium ions . LTP-OG-10 exhibits better electrochemical performance compared with those using oxalic acid (LTP-O) or glucose (LTP-G) single carbon source. LTP-OG-10 anode delivers the discharge capacity of 112.5 mA h g −1 , 96.8 mA h g −1 , and 54.2 mA h g −1 at 0.2 C, 5 C and 20 C, respectively, much larger than that of LTP-O and LTP-G. Moreover, LTP-OG-10 demonstrated excellent cycling performance, with the capacity retention of 71.1% after 400 cycles at 0.2 C, 22.9% higher than that of LTP-G. The good electrochemical properties of LTP-OG-10 is mainly ascribed to the increase of defects, high-quality and appropriate thickness of carbon layer. Our study reveals that preparing LiTi 2 (PO 4 ) 3 @carbon composite using double carbon sources is an efficient approach to enhance its electrochemical properties.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机非金属材料
·
功能材料
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yong Luo,Fen Xu,Lixian Sun,Yongpeng Xia,Yuan Yao,Yanxun Guan,Songwen Fang,Haopan Hu,Chenchen Zhang,Riguang Cheng,Yanling Zhu,Qiwei Shao,Yongjin Zou,Bin Shi,Rongjiang Li
The recycling of spent graphite from lithium-ion batteries (LIBs) is gaining significant importance, emphasizing the urgent need for effective treatment and recycling methods. This work focuses on the recovery of graphite from waste lithium-ion batteries and the exploitation of feasibility of utilizing the upgraded graphite as the sulfur (S) hosts in lithium‑sulfur batteries (LSBs). The recovered graphite (RG) from end-of-life LIBs is etched with potassium hydroxide (KOH) to obtain layered graphite (LG). The results show that the successful implementation of this etching process leads to the formation of LG with enlarged layer spacing. Then, the LG/S cathode material is obtained by melting and diffusing sulfur. Thanks to the synergistic effect between micropores and mesopores , as well as the increased degree of graphitization in LG, the LG/S cathode with up to 74 % sulfur has an initial discharge specific capacity of 1312 mA h g −1 at a current density of 0.1C. Its reversible capacity stabilizes at 700 mA h g −1 after 500 cycles, with a low-capacity decay rate of 0.093 % for each cycle. This study presents a novel approach to design cost-effective sulfur‑carbon composite cathodes for LSBs by utilizing spent graphite from end-of-life LIBs.
研究领域:
电化学储能
·
材料科学
·
能源化学
·
循环经济
·
电池回收
·
先进电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2013
·
IF 4.675
B.Z. Li,Y. Wang,L. Xue,X.P. Li,W.S. Li
A novel LiMn 0.8 Fe 0.2 PO 4 /C composite is synthesized via a sol–gel process. In this composite, acetylene black is embedded in LiMn 0.8 Fe 0.2 PO 4 . The structure and morphology of the resulting composite are characterized with XRD , SEM, TEM, and BET, and its performance as the cathode of lithium ion battery is investigated by charge–discharge test and EIS , with a comparison of the sample prepared without embedding acetylene black. It is found that the embedded composite exhibits better performance than the non-embedded sample. The former delivers a reversible capacity of 160 mAh g −1 , while the latter only 142 mAh g −1 at 0.1 C (1C = 150 mAh g −1 in the work). The embedded acetylene black not only functions as a barrier for the growing of LiMn 0.8 Fe 0.2 PO 4 particles in the preparation process, which is important for the formation of nano-particles, but also helps build a stable conductive network, thus improving the charge–discharge performance of LiMn 0.8 Fe 0.2 PO 4 .
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
危险品化学品经营许可证（带存储）