Improved Li+ diffusion enabled by SEI film in a high-energy-density hybrid magnesium-ion battery

Wang, Xusheng; Ding, Jingyi; Chen, Jitao; Xue, Mianqi

doi:10.1016/j.jpowsour.2019.227190

Cited by 11 publications

(8 citation statements)

References 42 publications

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“…However, the charge transfer process is getting easier when LiCl is added to APC/THF electrolyte where the value of R ct decreases with increasing LiCl concentration. The addition of LiCl in APC/THF not only increases the Li + transference number and ionic conductivity, but also decreases the charge transfer resistance [10,21] …”

Section: Resultsmentioning

confidence: 99%

“…As one type of conversion cathode candidates, transition metal sulfides (TMSs) [17] have been receiving great attentions owing to their high theoretical capacity, good electrical conductivity and relatively low cost, although the kinetic reaction is slow [18] . Typical conversion type TMS cathodes for MIBs including FeS x ( x =1, 2), [19] CuS, [20] a‐MoS 5.7 [21] and Cu 2 S [22] have been successfully employed in MLIBs to obtain fast reaction kinetics, high capacity and superior cycle life. For instance, α‐MoS 5.7 was used in MLIBs, [21] showing a satisfactory capacity of 539 mAh g −1 after 500 cycles tested at a current density of 300 mA g −1 ( α‐MoS 5.7 + x Li + +e − ↔ MoS 5.7−0.5 x +0.5 x Li 2 S).…”

Section: Introductionmentioning

confidence: 99%

“…Typical conversion type TMS cathodes for MIBs including FeS x ( x =1, 2), [19] CuS, [20] a‐MoS 5.7 [21] and Cu 2 S [22] have been successfully employed in MLIBs to obtain fast reaction kinetics, high capacity and superior cycle life. For instance, α‐MoS 5.7 was used in MLIBs, [21] showing a satisfactory capacity of 539 mAh g −1 after 500 cycles tested at a current density of 300 mA g −1 ( α‐MoS 5.7 + x Li + +e − ↔ MoS 5.7−0.5 x +0.5 x Li 2 S). Wang et al [22] .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Lithium‐Salt Controlled Electrolyte and Flower‐Like Cobalt Sulfide Cathode for High‐Performance Magnesium Lithium Dual Ion Batteries

Zhang

Yang

et al. 2021

ChemNanoMat

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Magnesium lithium dual ion batteries (MLIBs) possess the advantages of Mg anodes with low dendrite formation tendency, high volumetric capacity and abundant resources. The fast reaction kinetics of Li+ ions for the whole electrochemical redox processes contribute to provide high reversible capacity and long cycle life. In this study, we propose one type of MLIBs coupled with Mg anodes, flower‐like cobalt sulfide (CoS) cathodes, all‐phenyl complex (APC) and lithium chloride dissolved in tetrahydrofuran (THF) derived APC‐x LiCl/THF (x=0–0.8 mol L−1) electrolytes. By virtue of APC‐0.8 LiCl/THF electrolyte, the capacity of MLIB increases gradually to a high capacity of 507 mAh g−1 at 0.1 A g−1 and maintains a reversible capacity of 219 mAh g−1 at 0.5 A g−1 after 500 cycles. More significantly, Mg2+ and Li+ ions co‐conversion mechanism on the CoS cathodes is demonstrated for MLIBs. The systems studied here may offer insights in the design of MLIBs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Lithium‐Salt Controlled Electrolyte and Flower‐Like Cobalt Sulfide Cathode for High‐Performance Magnesium Lithium Dual Ion Batteries

Zhang

Yang

et al. 2021

ChemNanoMat

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show abstract

“…In addition to sulfur cathode, sulfur-rich metal polysulfides are also good candidates for high-energy-density hybrid systems. Wang et al developed amorphous MoS x (x = 5:7, a-MoS 5.7 ) polysulfide as cathode in Mg-Li hybrid batteries with the dis-charge mechanism of a-MoS 5:7 + x Li + + xe − ⟶ MoS 5:7−0:5x + 0:5x Li 2 S (x ≤ 8:4) [61]. In the electrolytes without LiCl, the large charge-transfer resistance prevents Mg 2+ from diffusion in α-MoS 5.7 ; thus, Mg 2+ hardly contributes to the capacity.…”

Section: Boost Of Conversion Reaction From LImentioning

confidence: 99%

Mg-Li Hybrid Batteries: The Combination of Fast Kinetics and Reduced Overpotential

Zheng

Guo

et al. 2022

Energy Mater Adv

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It is imperative for the development of cost-effective and high-performance batteries. Currently, lithium-ion batteries still occupy most of the market. However, limited lithium (Li) resource and energy density retard their further development. The magnesium (Mg) metal has several significant advantages; those make it a viable alternative to Li as anode, including high volume specific capacity and dendrite-free plating during cycling and high abundance. The Mg-Li hybrid batteries can combine the advantages of Li ion and Mg metal to achieve fast electrode kinetics and smooth anode deposition morphology. This review summarizes recent progresses in cathode material design and anode interface modification for Mg-Li hybrid batteries. We aim to illustrate the contribution of Li+ to the electrochemical performance improvement at both cathode and anode sides and to provide inspiration for the future research in this field.

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“…During this lithiation and delithiation process, the specific capacities of two kinds of batteries decline first, then increase slowly, and tend to be stable gradually, which is consistent with the trend seen for the current density of 100 mA/g. With the imbedding of lithium ions into the micropores, defects and the formation of SEI film, 33,34 the capacities of the composites then go up, this might due to the enhancement in the conductivity of the composites, which make the deintercalation of lithium ions be easier, and then the electrode materials are activated. The performance of the supercapacitor carbon (SC) was also evaluated under the same conditions (the mass ratio of 70:20: 10 for carbon powder, acetylene black, and PVDF), the cycling property of SC has a stable capacity of about 105 mAh/g over a long period of 550 cycles, indicating that the activation of the composites mainly occur on the polymers.…”

Section: Constant Current Charge and Discharge Testmentioning

confidence: 99%

High performance electrode material for Li-organic battery based on quinoxalin-thiophene conjugated polymer/carbon powder composite

Yue

Zhao

Kong

2022

High Performance Polymers

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In this work, thiophene derivatives were selected as donor units and pyrazine derivatives as receptor units to synthesize two composite materials consisting of supercapacitor carbon (SC) loaded with poly [2,3-bis (2-pyridinyl)-5,8-bis (2-thiophenyl) quinoxaline] (PPTQ) or poly [2,3-bis (2-pyridinyl)-5,8-bis (2-(3,4-ethylenedioxythiophene) quinoxaline] (PPETQ) by cationic radical polymerization. First, chemical bonds structure, surface morphology, and element valence states of these materials were characterized by infrared (IR), scanning electron microscopy (SEM) and XPS in turn. CV curves were used to determine their initial oxygen reduction potentials and to calculate their HOMO and LUMO values, both polymers have a narrow band gap, with Eg values lower than 2 eV. The polymer composite materials were tested as anodes in lithium-ion batteries, with a lithium sheet used as the counter electrode. Then the constant current charge-discharge and electrochemical impedance spectroscopy (EIS) impedance were measured. The first discharge specific capacities of PPTQ@SC and PPETQ@SC were 895.9 mAh/g and 913.0 mAh/g at a current density of 100 mA/g, the formation of a SEI film occurred in the second cycle, and their coulomb efficiencies can reach more than 90% from the third cycle, and the discharge platform appeared at about 1.0 V. In contrast, due to its stronger electron-donating ability, the PPETQ polymer containing the 3,4-ethylenedioxythiophene (EDOT) group have better electrical conductivity and its honeycomb structure provides more active sites for the lithiation/delithiation redox process. Therefore, the specific capacity of PPETQ@SC are all higher than that of PPTQ@SC at different current densities.

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Improved Li+ diffusion enabled by SEI film in a high-energy-density hybrid magnesium-ion battery

Cited by 11 publications

References 42 publications

Lithium‐Salt Controlled Electrolyte and Flower‐Like Cobalt Sulfide Cathode for High‐Performance Magnesium Lithium Dual Ion Batteries

Lithium‐Salt Controlled Electrolyte and Flower‐Like Cobalt Sulfide Cathode for High‐Performance Magnesium Lithium Dual Ion Batteries

Mg-Li Hybrid Batteries: The Combination of Fast Kinetics and Reduced Overpotential

High performance electrode material for Li-organic battery based on quinoxalin-thiophene conjugated polymer/carbon powder composite

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