MINERALS ENGINEERING
·
2022
·
IF 5.479
Qinglong Luo,Mingzhe Dong,Quan Li,Zhijian Wu,Zhong Liu,Jun Li
The selective extraction of lithium from brine by lithium aluminum layered double hydroxides (Li/Al-LDHs) adsorption is used industrially. To maintain the structural and performance stability of the Li/Al-LDHs adsorbent, the Li/Al-LDHs adsorbent can be doped with some high electron density metals such as Fe(III) and regenerated by dilute Li-containing aqueous solution. In this study, we use Fe(III) doping and FeOOH nanocomposite to stabilize the structure of Li/Al-LDHs. The nanocomposites of Li/Al-LDHs, Fe dopped Li/Al-LDHs (Fe-Li/Al-LDHs), and FeOOH were synthesized by the phase-separated sol–gel method and granulated by using crosslinked alginate polymers. The nanocomposites and granulated nanocomposites were characterized by SEM, TEM, XPS, FT-IR, and XRD analyses. The adsorption–desorption performance of the granulated nanocomposites was evaluated with a single LiCl solution and the brine from Da Qaidam Salt Lake. The isotherms, kinetics, and thermodynamics parameters and Arrhenius parameters of the lithium adsorption of the granulated nanocomposites were obtained. At the 80% mass loading of the nanocomposites in the granulation, the granulated nanocomposites statically adsorbed 9.46 mg/g lithium and dynamically 8.18 mg/g lithium from Da Qaidam Salt Lake brine. The Fe(III) doping and nanocomposite with FeOOH reduced the dissolution of the Li/Al-LDHs in the granulated nanocomposites and did not negatively affect the adsorption capacity of the granulated nanocomposites.
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高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Sisi Wu,Jing Yang,Ning Qin,Yingzhi Li,Haiou Wang,Yong-Wei Zhang,Qing Wang,Zhouguang Lu
LiO2 is a critical intermediate of oxygen reduction reaction in nonaqueous Li–O2 batteries that largely determines the discharge capacity and cycling stability. Currently, functional redox mediators that can promote the solution reaction route by enhancing the solvation of LiO2 have attracted tremendous interest to increase the attainable capacity. Conversely, redox mediators that quench LiO2 and facilitate the surface reaction route receive little attention. Here, we provide an in-depth exploration of the catalytic pathway and effect of a superoxide quencher that modulates the surface growth of Li2O2. Surprisingly, the predomination of the surface reaction route by ethyl viologen helps deliver a capacity as much as that promoted by the solution reaction route. The findings of this work provide a new direction of screening and evaluating functioning redox mediators for Li–O2 batteries.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Sen Jiang,Xin Xu,Junying Yin,Haihua Wu,Xuequan Zhu,Hongtao Guan,Lai Wei,Kang Xi,Yuelang Lan,Linghao Zhang,Yang Qiu,Yunfang Gao
Li metal batteries (LMBs) coupled with Ni-rich materials are promising candidates for next-generation high-energy-density lithium batteries. However, due to the inferior stability of cathode/solid-electrolyte interphases (CEI/SEI) and aggressive chemistry of Ni-rich cathode materials, Li metal anode (LMA) and LiPF 6 -based carbonate electrolytes pose a threat to the achievement of high-energy-density LMBs. Herein, 1-(trimethylsilyloxy)cyclohexene (TMSCH) with functional groups (C=C, Si-O) as a novel multi-functional electrolyte additive is employed to regular the CEI/SEI films on the both Ni-rich cathode materials (LiNi 0.8 Co 0.1 Mn 0.1 O 2 , NCM811) and LMA surface, and scavenge detrimental hydrogen fluoride (HF) to enhance electrochemical performances of the Li/NCM811 batteries. Furthermore, the theoretical calculation, electrochemical measurements and physical characterizations demonstrate the feasibility and effectiveness of the strategy. Specially, the TMSCH-derived SEI film exhibits a hierarchical structure consisting of an organic-rich outer layer and a LiF-rich inner layer. Accordingly, the microcracks generation of NCM811 secondary particles, transition metal ions dissolution, lithium dendrite growth, parasitic reactions and HF generation of electrolyte are effectively addressed. As a result, with existence of the TMSCH additive, the capacity retention of Li/NCM811 batteries at 1C are remarkably enhanced from 68.2% to 84.9% at 30 °C and 64.2% to 85.8% at 45 °C. Furthermore, the Li/Li symmetric cells with TMSCH can stably cycle over 1000 h at 0.2 mA cm −2 and exhibit super-low overpotential of 75 mV at 1 mA cm −2 .
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 6
·060507
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IF 4.386
Zining Man,Hao Tian,Xingbao Zhu,Yu Wang,Yuanguo Wu,Xiangyu Wen,Zhe Lü
The solid-state batteries have received widespread attention due to their excellent stability and safety, however, the low ionic conductivity and weak interface contact always restricted its performance. In this work, we propose an in situ thermally cross-linked and solidified polymer electrolyte with polyethylene glycol diacrylate (PEGDA) as scaffold in which succinonitrile (SN) and lithium bis-trifluoromethanesulfonimide (LiTFSI) were further introduced to improve the ionic conductivity. Herein, the composite gel was served as not only solid-solid interface material but also solid-state electrolyte. Different with conventional polymer gels, the solvent evaporation could not happen for this composite material during the solidification process, and therefore resulting in good interface contact without inside bubbles. We further present the investigation on transport principle of Li+ in the solid-state electrolyte and the effect of molecular chain on ionic conductivity. The conductivity of the solid-state electrolyte can reach 1.76 × 10−4 S cm−1 at room temperature without any assistance of liquid electrolytes, which is attributed to the short molecular chain of PEGDA. Electrochemical window of the solid-state electrolyte can reach 5.2 V after cross-linking treatment. And the lithium-oxygen battery using this solid-state electrolyte can stably cycle for more than 1100 cycles with a current density of 200 mA g−1 and a limit capacity of 200 mAh g−1 at room temperature.
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高影响因子
ACS Applied Materials & Interfaces
·
2022
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IF 10.383
Min Xue,Mufan Cao,Chengyang Xu,Dewei Xiao,Xiaogang Zhang
Polymer-based materials with the incorporation of redox-active dopants serve as promising electrodes for Li-ion batteries but their use is restricted by the limited doping level and inevitable dissolution behavior of the dopants. Here, we proposed a conjugated polymer-based electrode with an assistant dopant to realize the reversible capacity contribution of a redox-active dopant. By employing phosphate anion (PO) as the assistant dopant to stable the polymer matrix, the reversible capacity was improved by introducing indigo carmine (IC) into the polymer electrode. Based on the real-time monitoring of the electrochemical quartz crystal microbalance toward the mass change, the charge storage behavior of the redox-active dopant IC was observed and the stabilizing effect of the assistant dopant PO was revealed. The modified electrode delivered an increased capacity of 191 mA h g–1, and the reversible capacity remained 56% higher than that of the PO-undoped electrode after 200 cycles. The dual-doping strategy with the assistant dopant and the redox-active dopant is used to develop advanced polymer-based electrodes for high-capacity and long-cycling batteries.
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PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Lidan Wang,Youcai Lu,Shiyu Ma,Zheng Lian,Xiaolei Gu,Jie Li,Zhongjun Li,Qingchao Liu
Li-CO 2 batteries have attracted widespread attention due to their high energy density and environmental friendliness . However, problems such as the activation of CO 2 and the decomposition of discharge products (Li 2 CO 3 and C) are the key to restrict its development. Herein, an amine-based o-phenylenediamine (OPD) as a bifunctional liquid catalyst is introduced into Li-CO 2 battery , which realizes a great improvement of electrochemical performances by optimizing CO 2 reduction and evolution reaction process. Experiments coupled with theoretical calculations verify that the introduced OPD accelerates the migration of the discharge intermediates and makes the discharge products grow through the solution phase pathway, which greatly eliminates the passivation of the cathode as well as releases the battery capacity. Moreover, OPD, as a liquid redox mediator, can effectively promote the decomposition of discharge products, greatly reduce the charging potential and improve round-trip efficiency. Additionally, thanks to the increased activity of CO 2 reduction reaction (CDRR) and CO 2 evolution reaction (CDER) catalyzed by OPD, the cycling performance of Li-CO 2 battery has also been improved.
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高影响因子
Energy Technology
·
2022
·Vol. 10
·期 7
·2200269
·
IF 4.149
Yang Luo,Yicheng Deng,Yifei Shen,Hui Li,Yuliang Cao,Xinping Ai
Chemical prelithiation is considered to be a facile and efficient strategy to compensate the initial irreversible capacity loss of anode materials for achieving full capacity utilization of Li-ion batteries (LIBs). However, most of the prelithiation reagents reported so far are difficult to apply for commercially used graphite (Gr) anode due to their higher redox potentials than the formation potential of graphite–lithium compounds and the co-intercalation behavior in the interlayers of Gr anode, causing the exfoliation and destruction of Gr structure during prelithiation process. Herein, a new prelithiation solution for Gr anode by using lithium naphthalenide as a lithiation reagent and 2-methyl tetrahydrofuran as a reduction-tolerant solvent is demonstrated. This prelithiation solution has a very low redox potential of 0.19 V and can controllably and efficiently prelithiate Gr anode to a required degree in a few minutes without the solvent co-intercalation. Benefiting from these advantages, the Gr anode prelithiated for 3 min exhibits a high initial Coulombic efficiency of 100%, a better rate capability, and higher cycling capacity retention than conventional pristine Gr anode. Particularly, this prelithiation solution is low cost, easily synthesized, and recycled for industrial production, thus offering a practical convenience for LIBs manufacture.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2022
·
IF 4.598
Deyu Mao,Shenglong Yi,Zirui He,Qiancheng Zhu
Lithium-oxygen (Li-O 2 ) batteries with high theoretical energy density are well developed over the past decade, as the cycle performance and round-trip efficiency had enhanced prominently. However, there are still several obstacles that need to be tackled before commercial application. Among them, proper cathode structure design with low cost stands as a core problem. A Typical type of gas diffusion layer cathode are usually carbon paper, which is valuableness, meanwhile, cannot fit the application of flexible devices. In this work, non-woven fabrics were applied as basis materials to synthesis Fe 3 C/N-doped carbon tubes gas diffusion layer by a simple carbonization method. The resulting carbon cloth can be used directly as binder-free and current collector-free cathode for Li-O 2 batteries. More than 130 stable cycles were achieved. The composite synthesized in this paper has the possibility for future application in flexible lithium-oxygen batteries and provide a new strategy for the recovery of non-woven fabrics.
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高影响因子
Advanced Energy Materials
·
2022
·Vol. 12
·期 12
·2102764
·
IF 29.698
Zongqiang Sun,Xiaodong Lin,Wenjie Dou,Yanyan Tan,Ajuan Hu,Qing Hou,Ruming Yuan,Mingsen Zheng,Quanfeng Dong
The large charge overpotential and poor cycling stability triggered by sluggish Li 2 O 2 oxidation kinetics and severe superoxide-related side reactions greatly restrict the development and application of lithium–oxygen batteries. Finding out high-efficiency catalysts that can effectively facilitate a highly reversible formation/decomposition of lithium peroxide is still a crucial challenge in the field of Li–O 2 batteries. Herein, a soluble catalyst of 2,2'-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) that can promote highly reversible formation and decomposition of Li 2 O 2 during discharge and charge processes is reported for the first time. During discharge, it can capture and couple two LiO 2 intermediates via its sulfonate and ammonium ions, and induce the intramolecular disproportionation reaction to produce Li 2 O 2 through ionic microenvironment, which not only prompts the solution-phase growth of Li 2 O 2 , but also restricts the reactivity of LiO 2 intermediate, thus significantly alleviating the electrode surface passivation issue and suppressing the superoxide-related side reactions. During charge, it can quickly transport electrons between the electrode and Li 2 O 2 by serving as a new kind of redox mediator (RM), thus greatly facilitating the Li 2 O 2 oxidation kinetics. As a result, the Li–O 2 batteries that incorporate ABTS exhibit outstanding electrochemical performance, low charge overpotential, high discharge capacity, and high cycling stability.
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高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zhijia Zhang,Yuanyuan Yang,Wei Guo,Ganggang Chang,Junsheng Li
Lithium–sulfur (Li–S) batteries are considered promising next-generation energy storage systems due to their high energy density and low cost. However, their practical application still faces challenges such as the “shuttle effect” caused by polysulfides (LiPS). In this work, we use environmentally friendly bacterial cellulose (BC) as the substrate and prepare a flexible Ni-containing coordination polymer-modified carbonized BC interlayer (Ni-CBC). The combined electrochemical theoretical analysis shows that Ni-CBC not only captures LiPS effectively but also facilitates the electrochemical conversion of the adsorbed LiPS. As a result of these favorable features, the battery with the Ni-CBC interlayer delivers a stable discharge performance at 0.2C during long charge–discharge cycles and a high rate capacity of 852 mAh g–1 at 2C. This work suggests that cellulose-based materials with tailored functionality can improve the performance of Li–S batteries.
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PubMed
高影响因子
Energy Storage Materials
·
2022
·
IF 20.831
Yunlong Deng,Jian Gao,Ming Wang,Congshan Luo,Chuanjiyue Zhou,Mengqiang Wu
Metallic Li anode has attracted much attention for the high energy density rechargeable Li batteries , owing to the low potential and ultrahigh theoretical specific capacity. However, the Li dendrite growth and high activity of Li hinder the application of lithium anode. In this work, the multiplex alloy composite skeletons have been prepared via a facile two-step preparation method to solve the drawbacks of Li anode, which can form uniformly distributed nucleation sites , homogenize Li-ion flux and reduce local ionization density to suppress the growth of lithium dendrites. Based on the analysis of cross-sectional operando microscopy images, it can be confirmed that the synthesized 3D composite alloy anodes can effectively suppress the formation and growth of lithium dendrites. Li-Mg-Ca electrode exhibits the most excellent mechanical property, thermostability, interfacial stability and electrochemical cycling stability. Specifically, Li-Mg-Ca alloy electrode exhibits the stable charge-discharge cycling performance for 1000 h (pristine Li only for 120 h) at a current density of 2 mA cm −2 for 4 mAh cm −2 . The practical 350 Wh kg −1 pouch cell works well and meets the energy requirements of electronic devices. Importantly, the research work in this article provides research ideas for the later lithium-free anode materials .
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 51
·2306868
·
IF 19
Zhipeng Jiang,Tao Yang,Chen Li,Jiahang Zou,Hanxu Yang,Qingan Zhang,Yongtao Li
Ether-based electrolytes have high ionic conductivity and good stability toward the lithium metal anode relative to carbonate-based electrolytes, but they typically exhibit poor oxidation stability (<4 V vs Li + /Li). Most approaches aimed at enhancing the oxidative stability of ether-based electrolytes, such as “salt-in-solvent” and “weakly solvating” strategies, often sacrifice their inherent advantage of high ionic conductivity. Herein, this article proposes a cost-effective synergistic additive strategy by co-adding LiNO 3 and vinylene carbonate (VC) to achieve an optimized ether-based electrolyte (OEE) that simultaneously offers high Li-ion (Li + ) conductivity (11.52 mS cm −1 at 20 °C) and high-voltage stability (4.4 V). LiNO 3 and VC can enter the inner solvation shell of the electrolyte, preferentially participating in the film-forming progress at the electrode surface, leading to the formation of a unique organic–inorganic bilayer interfacial protective layer. This layer could effectively suppress electrolyte side reactions and enhance electrode stability. As a result, the 4.4 V Li-LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NCM811) full cells assembled with the OEE exhibit stable cycling performance at both room temperature and low temperature. This work provides a new approach to the design of ether-based electrolytes for high-voltage lithium metal batteries.
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高影响因子
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