Judicious design of lithium iron phosphate electrodes using poly(3,4-ethylenedioxythiophene) for high performance batteries

Cíntora-Juárez, Daniel; Vicente, C.; Kazim, Samrana; Ahmad, Shahzada; Tirado, J.L.

doi:10.1039/c5ta03542b

Cited by 15 publications

(13 citation statements)

References 52 publications

(91 reference statements)

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“…These values are plotted as red bars in Figure (b) and reveal a polarization value of 0.13 V for NVP‐BM0h, whereas values as low as 0.08 V were calculated for the samples prepared by ball milling. In addition, the direct‐current resistance ( R dc ) at the voltage plateau can be calculated from the slope of the polarization versus current plot (Figure , a) . These results have been plotted as blue bars in Figure (b).…”

Section: Resultsmentioning

confidence: 99%

High‐Performance Na3V2(PO4)3/C Cathode for Sodium‐Ion Batteries Prepared by a Ball‐Milling‐Assisted Method

et al. 2016

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Na 3 V 2 (PO 4 ) 3 /C samples are synthesized by a wet-ballmilling and in situ carbon-compositing process. The structural and morphological characterization of the milled samples shows that they are highly pure and crystalline composites, in which the specific surface undergoes an effective increase. The sample prepared by milling for 24 h shows an excellent electrochemical behavior and reaches a capacity value as high as Recently, renewed attention has been paid to sodium-ion batteries. Owing to the great commercial success of Li-ion batteries in the electronic market and, more importantly, the large expectations for their use in transport media, a future scarcity of lithium resources has been predicted. [4,5] Although sodium and lithium compounds usually form analogues with similar crystal structures, they may also build different frameworks for related stoichiometries. [6,7] This suggests that successful research into sodium systems may rely on new chemistry to overcome the low-energy-density issue. For example, NaFeF 3 is stable, whereas the Li analogue does not exist. [8] Polyanion compounds have 3D structures with open channels that facilitate the diffusion of large Na + ions. In particular, compounds with the general formula A x M y (PO 4 ) 3 (NASICON phosphates) have been studied as fast sodium-ion conductors. Their structures consist of corner-shared MO 6 and PO 4 polyhedra and provide highly stable frameworks for the reversible insertion of sodium. Recently, carbon-coated Na 3 V 2 (PO 4 ) 3 was re- [a]

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Section: Resultsmentioning

confidence: 99%

High‐Performance Na3V2(PO4)3/C Cathode for Sodium‐Ion Batteries Prepared by a Ball‐Milling‐Assisted Method

et al. 2016

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“…Conductive polymers were used as additive of electrodes of batteries [86][87][88][89][90] . For example, PEDOT:PSS was added into LiFePO4 electrodes of Li ion batteries 87 .…”

Section: Energy Storagementioning

confidence: 99%

Recent Advances of Intrinsically Conductive Polymers

Ouyang¹

2018

Acta Physico-Chimica Sinica

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Intrinsically conductive polymers are a class of exciting materials since they combine the advantages of both metals and plastics. But their application is limited due to the issues related to their electronic properties, stability and processibility. For example, although polyacetylene can have electrical conductivity comparable to metals, it degrades fast in air. Most of the conductive polymers in the conductive state, such as polypyrrole and polythiophene, cannot be dispersed in any solvent and cannot be turned to a melt. It is thus difficult to process them into thin films with good quality, while thin films with good quality are important for many applications. In terms of the materials processing, polyaniline (PANi) and poly(3,4-ethylenedioxythiophene) (PEDOT) have gained great attention. PANi doped with some large cations can be dispersed in some toxic organic solvents, and poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) can be dispersed in water and some polar organic solvents. But the PANi and PEDOT:PSS films prepared from their solutions are usually low. Recently, great progress was made in improving the properties of intrinsically conductive polymers. The conductivity of PEDOT:PSS can be enhanced from 10 −1 S•cm −1 to > 4000 S•cm −1 through the so-called "secondary doping". The high conductivity together with the solution processibility enables the application of conductive polymers in many areas, such as electrodes and thermoelectric conversion. In addition, due to their electrochemical activity, conductive polymers or their composites with inorganic materials can have high capacity of charge storage. Conductive polymers can also be added into the electrodes of batteries, because they can facilitate the charge transport and alleviate the large volume change problem of silicon electrode of batteries. It has been demonstrated that conductive polymers can have important application in many areas, such as transparent electrode, stretchable electrode, neural interfaces, thermoelectric conversion and energy storage system. This article provides a brief review on the enhancement of the electrical conductivity of intrinsically conductive polymers and their application as electrodes and in thermoelectric conversion, supercapacitors and batteries.

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“…Composites containing CPs and inorganic redox materials, such as lithium ion battery cathodes, have also been explored. For example, using a suspension of PEDOT:PSS together with the typical formulation used for lithium ion cathode materials, with lithium iron phosphate as the active component, results in improved rate capabilities. , Although PEDOT:PSS can be solution-processed, it is truly a suspension, which is why it cannot be considered a soluble conducting additive.…”

Section: Introductionmentioning

confidence: 99%

“…For example, using a suspension of PEDOT:PSS together with the typical formulation used for lithium ion cathode materials, with lithium iron phosphate as the active component, results in improved rate capabilities. 29,30 Although PEDOT:PSS can be solution-processed, it is truly a suspension, which is why it cannot be considered a soluble conducting additive. Instead of exploring these common paths of creating a composite in which a CP has binder and conducting properties, we choose to further study post-deposition polymerization, where a precursor for a CP in the form of a trimer is deposited on the electrode and subsequently polymerized in situ.…”

Section: Introductionmentioning

confidence: 99%

An Alternative to Carbon Additives: The Fabrication of Conductive Layers Enabled by Soluble Conducting Polymer Precursors – A Case Study for Organic Batteries

Strietzel

Oka

Strömme

et al. 2021

ACS Appl. Mater. Interfaces

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Utilizing organic redox-active materials as electrodes is a promising strategy to enable innovative battery designs with low environmental footprint during production, which can be hard to achieve with traditional inorganic materials. Most electrode compositions, organic or inorganic, require binders for adhesion and conducting additives to enable charge transfer through the electrode, in addition to the redox-active material. Depending on the redox-active material, many types and combinations of binders and conducting additives have been considered. We designed a conducting polymer (CP), with a soluble, trimeric unit based on 3,4-ethylenedioxythiophene (E) and 3,4-propylenedioxythiophene (P) as the repeat unit, acting as a combined binder and conducting additive. While CPs as additives have been explored earlier, in the current work, the use of a trimeric precursor enables solution processing together with the organic redox-active material. To evaluate this concept, the CP was blended with a redox polymer (RP), which contained a naphthoquinone (NQ) redox group at different ratios. The highest capacity for the total weight of the CP/RP electrode was 77 mAh/g at 1 C in the case of 30% EPE and 70% naphthoquinone-substituted poly(allylamine) (PNQ), which is 70% of the theoretical capacity given by the RP in the electrode. We further used this electrode in an aqueous battery, with a MnSO4 cathode. The battery displayed a voltage of 0.95 V, retaining 93% of the initial capacity even after 500 cycles at 1 C. The strategy of using a solution-processable CP precursor opens up for new organic battery designs and facile evaluation of RPs in such.

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Judicious design of lithium iron phosphate electrodes using poly(3,4-ethylenedioxythiophene) for high performance batteries

Cited by 15 publications

References 52 publications

High‐Performance Na3V2(PO4)3/C Cathode for Sodium‐Ion Batteries Prepared by a Ball‐Milling‐Assisted Method

High‐Performance Na3V2(PO4)3/C Cathode for Sodium‐Ion Batteries Prepared by a Ball‐Milling‐Assisted Method

Recent Advances of Intrinsically Conductive Polymers

An Alternative to Carbon Additives: The Fabrication of Conductive Layers Enabled by Soluble Conducting Polymer Precursors – A Case Study for Organic Batteries

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