Improvement of the Cycle Performance of LiNi&amp;lt;sub&amp;gt;0.5&amp;lt;/sub&amp;gt;Mn&amp;lt;sub&amp;gt;1.5&amp;lt;/sub&amp;gt;O&amp;lt;sub&amp;gt;4 &amp;lt;/sub&amp;gt; Cathode Active Materials by In-Situ Coating with Poly(3,4-Ethylenedioxythiophene)

Liu, Jinfeng; Xu, Jing

doi:10.4236/jpee.2017.512005

Cited by 3 publications

(4 citation statements)

References 9 publications

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“…The good cycling stability of LMNO-PE could be related to the ability of PEDOT:PSS to be a "barrier" against undesired side reactions of LMNO with the electrolyte. On the other hand, this effect has already been observed for cathodes produced with PVdF binder and PEDOT:PSS-coated LMNO particles [19][20][21][22][23]. Hence, this work demonstrates that it is possible to produce LMNO cathodes with aqueous binders maintaining the same performance of PVdF, in the case of pullulan, and improving them by the direct use of an electronically conductive binder such as PEDOT:PSS, without the need of LMNO particle coating.…”

Section: Discussionsupporting

confidence: 57%

“…The resulting material has been exploited to prepare electrodes with a PVdF-binder. PEDOT-coated LMNO particles featured a better capacity retention with respect to the pristine material, with improved gravimetric capacity [19]. Laisuo et al showed that a protective thin film of PEDOT on LMNO obtained by chemical vapor deposition (CVD) increases the rate capacity and extends the high temperature (50 • C) cycle life of LiMn 2 O 4 by over 60% [20].…”

Section: Introductionmentioning

confidence: 99%

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Performance Comparison of LMNO Cathodes Produced with Pullulan or PEDOT:PSS Water-Processable Binders

et al. 2022

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The aim of this paper is to demonstrate lithium metal battery cells assembled with high potential cathodes produced by sustainable processes. Specifically, LiNi0.5Mn1.5O4 (LMNO) electrodes were fabricated using two different water-processable binders: pullulan (PU) or the bifunctional electronically conductive poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT:PSS). The cell performance was evaluated by voltammetric and galvanostatic charge/discharge cycles at different C-rates with 1M LiPF6 in 1:1 (v:v) ethylene carbonate (EC):dimethyl carbonate (DMC) (LP30) electrolyte and compared to that of cells assembled with LMNO featuring poly(vinylidene difluoride) (PVdF). At C/10, the specific capacity of LMNO-PEDOT:PSS and LMNO-PU were, respectively, 130 mAh g−1 and 127 mAh g−1, slightly higher than that of LMNO-PVdF (124 mAh g−1). While the capacity retention at higher C-rates and under repeated cycling of LMNO-PU and LMNO-PVdF electrodes was similar, LMNO-PEDOT:PSS featured superior performance. Indeed, lithium metal cells assembled with PEDOT:PSS featured a capacity retention of 100% over 200 cycles carried out at C/1 and with a high cut-off voltage of 5 V. Overall, this work demonstrates that both the water-processable binders are a valuable alternative to PVdF. In addition, the use of PEDOT:PSS significantly improves the cycle life of the cell, even when high-voltage cathodes are used, therefore demonstrating the feasibility of the production of a green lithium metal battery that can exhibit a specific energy of 400 Wh kg−1, evaluated at the electrode material level. Our work further demonstrates the importance of the use of functional binders in electrode manufacturing.

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Section: Discussionsupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Performance Comparison of LMNO Cathodes Produced with Pullulan or PEDOT:PSS Water-Processable Binders

et al. 2022

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“…01-089-3604. The occurrence of the impurity phase is also reported in the literature. – The Rietveld refinement analysis quantifies the impurity phase to be 4 wt % in both LNMO and C-LNMO. Therefore, the more suitable notation for the LNMO phase is LiNi 0.5– x Mn 1.5+ x O 4 .…”

Section: Resultsmentioning

confidence: 62%

“…Therefore, the carbon coating offers a unique solution that combines all of the desired advantages. Several carbonaceous materials are reported in the literature that include camphoric carbon, graphene oxide, reduced graphene oxide, carbon nanotubes, heteroatom-doped carbons, sucrose-derived hard carbons, and conductive polymers such as polythiophene, polyimide, polyacrylonitrile, PANI, PEDOT, and so forth. – The surface protection and enhancement in electronic conductivity are successfully achieved by applying such coatings. However, the surface heterogeneity, doped heteroatoms, and functional groups catalyze the electrolyte decomposition .…”

Section: Introductionmentioning

confidence: 99%

Soft Carbon Integration for Prolonging the Cycle Life of LiNi_0.5Mn_1.5O₄ Cathode

Ghosh,

Mahapatra,

Bhowmik

et al. 2023

ACS Appl. Energy Mater.

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LiNi0.5Mn1.5O4 (LNMO) has the advantages of high voltage output (4.7 V), fast charging capability, and better thermal stability, which make it suitable for future applications in lithium-ion batteries. However, the limitation in cycle life due to the electrolyte and the structural instability during high-voltage cycling to 5 V is a major drawback. Further, the decomposition of the electrolyte on the highly reactive surface of LNMO plays a critical role in catalyzing the structural disintegration. The issue can be mitigated via the surface carbon coating on LNMO. Herein, a method to integrate soft carbon on LNMO is reported, which bypasses the drawback of lattice oxygen loss during the conventional carbon coating on metal oxides. The soft carbon derived from the pitch precursor with its unique blend of physical properties renders the LNMO surface less susceptible to electrolyte attack. As a result, capacity retention enhances by 25.6%, and the coulombic efficiency improves by 1.5% over 500 cycles in a carbonate-based 1 M LiPF6 electrolyte. The soft carbon regulates the interfacial composition balanced in LiF/Li x PO y F z and reduces the growth of the charger-transfer resistance. Moreover, the strategy also decreases the Mn dissolution by 18%.

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Conformal Conducting Polymer Shells on V₂O₅ Nanosheet Arrays as a High‐Rate and Stable Zinc‐Ion Battery Cathode

Wang

et al. 2018

Adv Materials Inter

197

123

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in LIBs are mostly organic and harmful, which inevitably enhance the difficulty and the cost of battery fabrication and also bring about some environmental impact. [3] As an alternative, rechargeable aqueous zinc-ion batteries (ZIBs) have shown great promise because of low toxicity, low cost, and the abundant distribution of zinc resources. [4] More importantly, zinc possesses a low redox potential (−0.762 V vs. standard hydrogen electrode) and a high theoretical capacity (819 mAh g −1 , 5851 mAh mL −1 ). [4d] Furthermore, zinc is stable in water, which can reduce the production cost and improve the safety. [5] Despite these advantages, it is a large challenge to develop a high-performance cathode material for aqueous ZIBs that provides high and stable capacities and keeps the structure integrity in Zn 2+ uptake, which is mainly due to heavy mass and high polarization of divalent Zn 2+ . Among various reported cathode materials (such as α, β, γ, and δ-MnO 2 , [4c,6] Prussian blue analogs, [7] Na 3 V 2 (PO 4 ) 3 , [8] and vanadium-based materials [9] ), vanadium pentoxide (V 2 O 5 ) is of particular interest owing to its high Zn 2+ ion storage capacity (≈590 mAh g −1 according to the two-electron redox center of vanadium) in its layered structure consisting of VO 5 units. [10] Unfortunately, V 2 O 5 cathodes exhibit rapid capacity decline during (de)intercalation of Zn 2+ due to the low ion diffusion coefficient, poor conductivity, elements dissolution, and selfaggregation. [11] To overcome this drawback, it has been reported that intercalation of H 2 O molecules into the interlayers of V 2 O 5 could effectively enlarge and maintain the layered configuration of V 2 O 5 -based materials, which offered high Zn 2+ ion storage capability and stable cycling performance. [5c,12] Also, by inserting other metallic ions such as Ca 2+ , [9a] Zn 2+ , [9e] Na + , [13] or Li + , [14] the formation of metal vanadium oxide bronzes has been demonstrated to enhance Zn 2+ storage performances. The typical structure of these metal vanadates is that the V-O layers expand along the c-axis while the intercalated metal ions and H 2 O molecules stay in the interlayer space. [15] Despite significant progress, further boosting the Zn 2+ storage ability of V 2 O 5 -based cathodes through other strategies is still urgently required, particularly at large rates.As a highly conductive and extremely stable polymer, poly(3,4-ethylenedioxythiophene) (PEDOT) has been reported to not only effectively improve the electronic conductivity of Aqueous zinc-ion batteries (ZIBs) have become research focus because of their cost-effectiveness, high safety, and eco-friendliness. Unfortunately, sluggish Zn 2+ diffusion kinetics and the poor cycling stability in cathode materials impede their large-scale application. Herein, V 2 O 5 @poly(3,4ethylenedioxythiophene) (PEDOT) hybrid nanosheet arrays are uniformly deposited on carbon cloth (CC) as a superior ZIB cathode. The as-fabricated V 2 O 5 @PEDOT/CC electrode displays a maximum capacity of 360 mAh ...

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Improvement of the Cycle Performance of LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4 </sub> Cathode Active Materials by In-Situ Coating with Poly(3,4-Ethylenedioxythiophene)

Cited by 3 publications

References 9 publications

Performance Comparison of LMNO Cathodes Produced with Pullulan or PEDOT:PSS Water-Processable Binders

Performance Comparison of LMNO Cathodes Produced with Pullulan or PEDOT:PSS Water-Processable Binders

Soft Carbon Integration for Prolonging the Cycle Life of LiNi_0.5Mn_1.5O₄ Cathode

Conformal Conducting Polymer Shells on V₂O₅ Nanosheet Arrays as a High‐Rate and Stable Zinc‐Ion Battery Cathode

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Improvement of the Cycle Performance of LiNi&lt;sub&gt;0.5&lt;/sub&gt;Mn&lt;sub&gt;1.5&lt;/sub&gt;O&lt;sub&gt;4 &lt;/sub&gt; Cathode Active Materials by In-Situ Coating with Poly(3,4-Ethylenedioxythiophene)

Cited by 3 publications

References 9 publications

Performance Comparison of LMNO Cathodes Produced with Pullulan or PEDOT:PSS Water-Processable Binders

Performance Comparison of LMNO Cathodes Produced with Pullulan or PEDOT:PSS Water-Processable Binders

Soft Carbon Integration for Prolonging the Cycle Life of LiNi0.5Mn1.5O4 Cathode

Conformal Conducting Polymer Shells on V2O5 Nanosheet Arrays as a High‐Rate and Stable Zinc‐Ion Battery Cathode

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Product

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Improvement of the Cycle Performance of LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4 </sub> Cathode Active Materials by In-Situ Coating with Poly(3,4-Ethylenedioxythiophene)

Soft Carbon Integration for Prolonging the Cycle Life of LiNi_0.5Mn_1.5O₄ Cathode

Conformal Conducting Polymer Shells on V₂O₅ Nanosheet Arrays as a High‐Rate and Stable Zinc‐Ion Battery Cathode