Application of quaternary polymer electrolyte based on ionic liquid in LiFePO4/Li, Li4Ti5O12/Li and LiFePO4/Li4Ti5O12 batteries

Swiderska‐Mocek, Agnieszka

doi:10.1016/j.electacta.2014.07.042

Cited by 22 publications

(10 citation statements)

References 56 publications

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“…Li + /Li by involving a redox couple of Ti 4+ /Ti 3+ , thus reduce the safety risk. However, this potential restricts output voltage of the full cell, especially if a cell adopts some low potential cathode, like LiFePO 4 . To extricate the dilemma, we introduced a polyanionic anode material, Li 2 TiSiO 5 in our previous work.…”

Section: Introductionsupporting

confidence: 61%

Li/Na Ion Intercalation Process into Sodium Titanosilicate as Anode Material

Liu

Wang

et al. 2019

Batteries & Supercaps

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A natisite structured material, Na 2 TiSiO 5 , has been investigated as anode for lithium-and sodium-ion batteries. The results show that Na 2 TiSiO 5 can deliver a capacity of 260 mAh g À 1 with good reversibility when used as anode in Li-ion batteries. In contrast to the conversion reaction mechanism observed for its analogue Li 2 TiSiO 5 , a solid-solution type intercalation mechanism is found for the lithiation/delithiation process of Na 2 TiSiO 5 .Lithium intercalation occurs through a three-dimensional diffusion path after crossing an energy barrier around 1.0 eV. Sodium-ions could only migrate through a one-dimensional channel after overcoming a much higher energy barrier of 1.8 eV, which solely delivers a reversible capacity of 40 mAh g À 1 for sodium-ion storage.[a] Dr.

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Section: Introductionsupporting

confidence: 61%

Li/Na Ion Intercalation Process into Sodium Titanosilicate as Anode Material

Liu

Wang

et al. 2019

Batteries & Supercaps

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“…[ 193 ] Interesting electrochemical and thermal properties are evidenced at sub-zero temperature conditions for 18 650 confi gurations. [ 199 ] Zaghib et al [ 200 ] suggested that 0.5 mol L −1 LiTFSI + 1 mol L −1 LiBF 4 in ECγ-butyrolactone (GBL) is found to be a better alternative compared to the thermally unstable LiPF 6 -based electrolytes when the LiFePO 4 /Li 4 Ti 5 O 12 cell operates at 60 °C. [ 195 ] The cell retains full-capacity after 20 000 cycles at 6 min charge (10 C) and 12 min (5 C) discharge, and slightly fades to ≈95% after 30 000 cycles, when increasing the charging rate of 15 C (4 min) with 5 C discharge, tested in parallel.…”

Section: Ti 5 O 12mentioning

confidence: 99%

“…Both electrodes were formulated with CMC binder. Furthermore, ionic liquid based quaternary polymer electrolyte (PVdF + LiTFSI + N ‐methyl‐ N ‐propylpiperidinium bis(trifluoromethanesulphonyl) imide (PP13‐TFSI)+ VC) were also proposed to retard the flammability of the conventional aprotic solvents in the LiFePO 4 /Li 4 Ti 5 O 12 configuration and they displayed a reversible capacity of ≈161 mAh g −1 with good rate performance characteristics . Zaghib et al suggested that 0.5 mol L −1 LiTFSI + 1 mol L −1 LiBF 4 in EC‐ γ‐ butyrolactone (GBL) is found to be a better alternative compared to the thermally unstable LiPF 6 ‐based electrolytes when the LiFePO 4 /Li 4 Ti 5 O 12 cell operates at 60 °C.…”

Section: Intercalationmentioning

confidence: 99%

Research Progress on Negative Electrodes for Practical Li‐Ion Batteries: Beyond Carbonaceous Anodes

Aravindan

Lee

Srinivasan

2015

Advanced Energy Materials

442

319

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3 of 43) 1402225 wileyonlinelibrary.comhost matrix is observed and this process is called "topotactic reaction", which is either chemically or thermally reversible; a perfect example is Li-intercalation into a graphite matrix. Such intercalation chemistry has been successfully used in Li-ion batteries for both anode and cathode materials and has also been commercialized (i.e., LiCoO 2 /Li x C 6 and LiFePO 4 /Li x C 6 ). [ 4,5 ] The insertion type materials, i.e., metal oxides have several advantages over graphitic anodes when used in practical cells; these include a negligible amount of ICL, no Li-platting issues, no solvent co-intercalation, no electrolyte decomposition, no SEI required for the safe operation of the cell, it is capable of delivering high power density, and has an easy synthesis protocol. On the other hand, less reversible capacity and higher intercalation potential are the notable setbacks compared to graphite. Although numerous Li-intercalating materials are proposed as possible anodes for LIB applications, few of them have only been tested or commercialized in the "rocking-chair" confi guration, for instance Li 4 Ti 5 O 5 anode. Apart from the mentioned anode, few other insertion type materials have been also evaluated in the rocking-chair confi guration for LIBs. Accordingly, the next section describes the structural and electrochemical performance of various intercalation anodes evaluated in the rocking-chair confi guration. TiO 2The existence of several polymorphs is reported for the case of TiO 2 , but anatase, rutile, brookite, and bronze phases have only been reported for Li-storage. [ 26 ] Reversible insertion of one mole of Li is theoretically possible, independent of the polymorph, with a capacity of ≈335 mAh g −1 . However, variation in the Liinsertion potential and reaction mechanism has been observed for such polymorphs. Easy synthesis protocols, scalability, inexpensiveness, ease of tailoring the desired morphology, and eco-friendliness are other key features for utilizing TiO 2 polymorphs for the construction of Li-ion power packs. [27][28][29] AnataseThe anatase phase is one of the widely investigated polymorphs of TiO 2 for Li-storage. [ 27 ] Theoretically, one mole of Li is possible, but practically only ≈0.5 mole Li is reversible upon cycling. Several research attempts have been carried out to improve the reversible capacity, including utilizing high energy (0 0 1) facets because of their dominant higher surface energy (0.90 J m −2 ) compared to (1 0 0) facets (0.44 J m −2 ) and using thermodynamically more stable (1 0 1) facets (0.53 J m −2 ). [ 30,31 ] Although high Li-reversibility could be achieved for such (0 0 1) facets, capacity fading remains an issue upon cycling. [ 32 ] Li-diffusion co-effi cient ( D Li ) values for anatase phase are in the range of 1 × 10 −17 to 4 × 10 −17 cm 2 s −1 for Li-insertion and extraction processes, respectively. [ 27 ] In the crystal chemistry of the anatase phase, TiO 6 octahedra sharetwo adjacent edges with two other octahedral so that...

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“…The reversible capacity of the full battery measured at a state of discharge is about 150 mA h g −1 , reaching about 99% of the maximum reversible capacity. The achieved energy density is 472 W h kg −1 , an enhanced value as compared to the majority of published batteries313233343536.…”

Section: Resultsmentioning

confidence: 89%

Enhancing the energy density of safer Li-ion batteries by combining high-voltage lithium cobalt fluorophosphate cathodes and nanostructured titania anodes

López

McDonald

et al. 2016

Sci Rep

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Recently, Li-ion batteries have been heavily scrutinized because of the apparent incompatibility between safety and high energy density. This work report a high voltage full battery made with TiO2/Li3PO4/Li2CoPO4F. The Li2CoPO4F cathode and TiO2 anode materials are synthesized by a sol–gel and anodization methods, respectively. X-ray diffraction (XRD) analysis confirmed that Li2CoPO4F is well-crystallized in orthorhombic crystal structure with Pnma space group. The Li3PO4-coated anode was successfully deposited as shown by the (011) lattice fringes of anatase TiO2 and (200) of γ-Li3PO4, as detected by HRTEM. The charge profile of Li2CoPO4F versus lithium shows a plateau at 5.0 V, revealing its importance as potentially high-voltage cathode and could perfectly fit with the plateau of anatase anode (1.8–1.9 V). The full cell made with TiO2/Li3PO4/Li2CoPO4F delivered an initial reversible capacity of 150 mA h g−1 at C rate with good cyclic performance at an average potential of 3.1–3.2 V. Thus, the full cell provides an energy density of 472 W h kg−1. This full battery behaves better than TiO2/Li2CoPO4F. The introduction of Li3PO4 as buffer layer is expected to help the cyclability of the electrodes as it allows a rapid Li-ion transport.

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Application of quaternary polymer electrolyte based on ionic liquid in LiFePO4/Li, Li4Ti5O12/Li and LiFePO4/Li4Ti5O12 batteries

Cited by 22 publications

References 56 publications

Li/Na Ion Intercalation Process into Sodium Titanosilicate as Anode Material

Li/Na Ion Intercalation Process into Sodium Titanosilicate as Anode Material

Research Progress on Negative Electrodes for Practical Li‐Ion Batteries: Beyond Carbonaceous Anodes

Enhancing the energy density of safer Li-ion batteries by combining high-voltage lithium cobalt fluorophosphate cathodes and nanostructured titania anodes

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