Performance evaluation of printed LiCoO2 cathodes with PVDF-HFP gel electrolyte for lithium ion microbatteries

Park, Moon Soo; Hyun, Sang Hwan; Nam, Sang Cheol; Cho, Sung Back

doi:10.1016/j.electacta.2008.03.007

Cited by 31 publications

(18 citation statements)

References 18 publications

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“…Therefore, GEs have been of great interest as high-performance electrolytes for the fabrication of advanced ESDs with enhanced safety and flexibility. [247,248] Lots of polar polymers, such as PEO, [249][250][251] poly(vinylidene fluoride) (PVDF), [252,253] poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP), [2,59,254,255] poly(methyl methacrylate) (PMMA), [256,257] and polyacrylonitrile (PAN) [258] have been employed as the polymer host (solid component) for GEs, owing to their good affinity with liquid components. At the same time, in addition to traditional OLEs, new liquid electrolytes such as ILEs [259,260] have also been of great interest for recent fabrications of GEs.…”

Section: Gel Electrolytesmentioning

confidence: 99%

Development of Electrolytes towards Achieving Safe and High‐Performance Energy‐Storage Devices: A Review

2014

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Increasing interest in flexible/wearable electronics, clean energy, electrical vehicles, and so forth is calling for advanced energy‐storage devices, such as high‐performance lithium‐ion batteries (LIBs), which can not only store energy efficiently and safely, but also possess additional properties, such as good mechanical properties to bear deformations or even to be used as structural components. These expectations first indicate the directions, but also raise new challenges for the advancement of energy materials. As one of the critical components in LIBs, the electrolyte connecting the two electrodes is vital for achieving the desired performances in batteries. In this Review, the developments of various liquid electrolytes (organic, ionic liquid, and aqueous electrolytes), solid electrolytes (solid polymer and inorganic solid), as well as gel electrolytes is briefly summarized and discussed. For each type of electrolyte, the challenging issues and possible solutions are discussed. In particular, safety, ionic conductivity, and contact/interface issues are emphasized. Finally, from a composite point of view, strategies for the development of high‐performance electrolytes with all‐round properties are proposed.

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Section: Gel Electrolytesmentioning

confidence: 99%

Development of Electrolytes towards Achieving Safe and High‐Performance Energy‐Storage Devices: A Review

2014

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“…The LiCoO 2 was chosen because of its excellent electrochemical stability and its capacity for insertion and extraction of lithium ions. These characteristics derive from its excellent structural stability [92]. The most common material used in thin-film batteries is LiCoO 2 , because it produces a high voltage [21,93] and has a high performance over the cycles of charge/discharge (owing to its structural stability, it can hold more than 500 cycles of charge/discharge maintaining its capacity at about 80% to 90%).…”

Section: Cathodementioning

confidence: 99%

Solid-State Thin-Film Lithium Batteries for Integration in Microsystems

Ribeiro

Silva

Carmo

et al. 2012

Scanning Probe Microscopy in Nanoscience and Nanotechnology 3

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The increasing miniaturization of electronic devices requires the miniaturization of devices that provide energy to them. Autonomous devices of reduced energy consumption are increasingly common and they have benefited from energy harvesting techniques. However, these devices often have peak power consumption, requiring storage of energy.This chapter presents the fabrication and characterization of thin-films for solidstate lithium battery. The solid-state batteries stand out for the possibility of all materials being solid and therefore ideal for microelectronics fabrication techniques. Lithium batteries are composed primarily of three materials, the cathode, the electrolyte and the anode. The positive electrode (cathode) and negative (anode) have high electrical conductivity and capacity for extraction and insertion of lithium ions. The electrolyte's main features are the high ionic conductivity and high electrical resistivity. The materials chosen for the battery are lithium cobalt oxide (cathode), lithium phosphorus oxynitride (electrolyte), and metallic lithium (anode).The lithium cobalt oxide cathode (LiCoO 2 ) was deposited by RF sputtering and characterized using the XRD, EDX, SEM techniques, and electrical resistivity. Fully crystalline LiCoO 2 was achieved with an annealing of 650 ı C in vacuum for 2 h. Electrical resistivity of 3:7 mm was achieved.The lithium phosphorus oxynitride electrolyte (LIPON) was deposited by RF sputtering and characterized using the techniques EDX, SEM, ionic conductivity, DSC, and TGA. Ionic conductivity of 6:3 10 7 S cm 1 for a temperature of 26 ı C was measured. The thermal stability of LIPON up to 400 ı C was also proved. The metallic lithium anode (Li) was deposited by thermal evaporation and its electrical resistance measured at four points during the deposition. Resistance of about 3:5 was measured for a thickness of 3 m. The oxidation rate of the lithium in contact with the ambient atmosphere was evaluated. The patterning process of the battery was developed by means of shadow masks.

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“…A variety of materials are available for the deposition of the cathode, electrolyte and anode. Lithium cobaltate (LiCoO 2 ) was the compound selected as the most suitable cathode due to its excellent electrochemical cycling stability, which is a result of the structural stability of the material, in which the layered cation ordering is extremely well preserved even after a repeated process of insertion and extraction of lithium ions [28]. Lithium cobaltate is the most widely used cathode material in thin-film Li-ion type of batteries, because it produces a very high potential [29] and it has superior performance in cycled charging/discharging (due to its high structural stability it can be cycled more than 500 times with a 80-90% capacity retention).…”

Section: Solid-state Battery Overview and Designmentioning

confidence: 99%

Thermoelectric generator and solid-state battery for stand-alone microsystems

Carmo

Ribeiro

Silva

et al. 2010

J. Micromech. Microeng.

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This paper presents a thermoelectric (TE) generator and a solid-state battery for powering microsystems. Prototypes of TE generators were fabricated and characterized. The TE generator is a planar microstructure based on thin films of n-type bismuth telluride (Bi 2 Te 3) and p-type antimony telluride (Sb 2 Te 3), which were deposited using co-evaporation. The measurements on selected samples of Bi 2 Te 3 and Sb 2 Te 3 thin films indicated a Seebeck coefficient in the range of 90-250 µV K −1 and an in-plane electrical resistivity in the range of 7-17 µ m. The measurements also showed TE figures-of-merit, ZT, at room temperatures (T = 300 K) of 0.97 and 0.56, for thin films of Bi 2 Te 3 and Sb 2 Te 3 , respectively (equivalent to a power factor, PF, of 4.87 mW K −2 m −1 and 2.81 mW K −2 m −1). The solid-state battery is based on thin films of: an anode of tin dioxide (SnO 2), an electrolyte of lithium phosphorus oxynitride (Li x PO y N z , known as LiPON) and a cathode of lithium cobaltate (LiCoO 2 , known as LiCO), which were deposited using the reactive RF (radio-frequency) sputtering. The deposition and characterization results of these thin-films layers are also reported in this paper.

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Performance evaluation of printed LiCoO2 cathodes with PVDF-HFP gel electrolyte for lithium ion microbatteries

Cited by 31 publications

References 18 publications

Development of Electrolytes towards Achieving Safe and High‐Performance Energy‐Storage Devices: A Review

Development of Electrolytes towards Achieving Safe and High‐Performance Energy‐Storage Devices: A Review

Solid-State Thin-Film Lithium Batteries for Integration in Microsystems

Thermoelectric generator and solid-state battery for stand-alone microsystems

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