scholarly journals Thin-film electrodes for high-capacity lithium-ion batteries: influence of phase transformations on stress

2016 ◽  
Vol 472 (2193) ◽  
pp. 20160093 ◽  
Author(s):  
Esteban Meca ◽  
Andreas Münch ◽  
Barbara Wagner
Keyword(s):  
Thin Film ◽  
Amorphous Silicon ◽  
High Capacity ◽  
Phase Field Model ◽  
Lithium Ion ◽  
Two Phase ◽  
Power Sources ◽  
Multigrid Algorithm ◽  
Comprehensive Picture ◽  
Characteristic Features

In this study, we revisit experiments by Sethuraman et al. (2010 J. Power Sources , 195 , 5062–5066. ( doi:10.1016/j.jpowsour.2010.02.013 )) on the stress evolution during the lithiation/delithiation cycle of a thin film of amorphous silicon. Based on recent work that show a two-phase process of lithiation of amorphous silicon, we formulate a phase-field model coupled to elasticity in the framework of Larché-Cahn. Using an adaptive nonlinear multigrid algorithm for the finite-volume discretization of this model, our two-dimensional numerical simulations show the formation of a sharp phase boundary between the lithiated and the amorphous silicon that continues to move as a front through the thin layer. We show that our model captures the non-monotone stress loading curve and rate dependence, as observed in recent experiments and connects characteristic features of the curve with the structure formation within the layer. We take advantage of the thin film geometry and study the corresponding one-dimensional model to establish the dependence on the material parameters and obtain a comprehensive picture of the behaviour of the system.

scholarly journals High Electrochemical Performance Silicon Thin-Film Free-Standing Electrodes Based on Buckypaper for Flexible Lithium-Ion Batteries

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2053
Author(s):  
Oyunbayar Nyamaa ◽  
Duck-Hyeon Seo ◽  
Jun-Seok Lee ◽  
Hyo-Min Jeong ◽  
Sun-Chul Huh ◽  
...  
Keyword(s):  
Thin Film ◽  
Electrical Conductivity ◽  
Electrochemical Performance ◽  
Electrode Materials ◽  
Electronic Devices ◽  
High Capacity ◽  
Lithium Ion ◽  
Free Standing ◽  
Power Sources ◽  
Current Collectors

Recently, applications for lithium-ion batteries (LIBs) have expanded to include electric vehicles and electric energy storage systems, extending beyond power sources for portable electronic devices. The power sources of these flexible electronic devices require the creation of thin, light, and flexible power supply devices such as flexile electrolytes/insulators, electrode materials, current collectors, and batteries that play an important role in packaging. Demand will require the progress of modern electrode materials with high capacity, rate capability, cycle stability, electrical conductivity, and mechanical flexibility for the time to come. The integration of high electrical conductivity and flexible buckypaper (oxidized Multi-walled carbon nanotubes (MWCNTs) film) and high theoretical capacity silicon materials are effective for obtaining superior high-energy-density and flexible electrode materials. Therefore, this study focuses on improving the high-capacity, capability-cycling stability of the thin-film Si buckypaper free-standing electrodes for lightweight and flexible energy-supply devices. First, buckypaper (oxidized MWCNTs) was prepared by assembling a free stand-alone electrode, and electrical conductivity tests confirmed that the buckypaper has sufficient electrical conductivity (10−4(S m−1) in LIBs) to operate simultaneously with a current collector. Subsequently, silicon was deposited on the buckypaper via magnetron sputtering. Next, the thin-film Si buckypaper freestanding electrodes were heat-treated at 600 °C in a vacuum, which improved their electrochemical performance significantly. Electrochemical results demonstrated that the electrode capacity can be increased by 27/26 and 95/93 μAh in unheated and heated buckypaper current collectors, respectively. The measured discharge/charge capacities of the USi_HBP electrode were 108/106 μAh after 100 cycles, corresponding to a Coulombic efficiency of 98.1%, whereas the HSi_HBP electrode indicated a discharge/charge capacity of 193/192 μAh at the 100th cycle, corresponding to a capacity retention of 99.5%. In particular, the HSi_HBP electrode can decrease the capacity by less than 1.5% compared with the value of the first cycle after 100 cycles, demonstrating excellent electrochemical stability.

Modeling the delamination of amorphous-silicon thin film anode for lithium-ion battery

2014 ◽  
Vol 246 ◽  
pp. 149-159 ◽  
Author(s):  
Siladitya Pal ◽  
Sameer S. Damle ◽  
Siddharth H. Patel ◽  
Moni K. Datta ◽  
Prashant N. Kumta ◽  
...  
Keyword(s):  
Thin Film ◽  
Amorphous Silicon ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Silicon Thin Film

Corrigendum to ‘Graphite-coated ZnO nanosheets as high-capacity, highly stable, and binder-free anodes for lithium-ion batteries’ [J. Power Sources 320 (2016) 314–321]

2016 ◽  
Vol 333 ◽  
pp. 254 ◽  
Author(s):  
Eliana Quartarone ◽  
Valentina Dall'Asta ◽  
Alessandro Resmini ◽  
Cristina Tealdi ◽  
Ilenia Giuseppina Tredici ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
High Capacity ◽  
Lithium Ion ◽  
Power Sources ◽  
Zno Nanosheets ◽  
Binder Free

scholarly journals In situ lithiated quinone cathode for ALD/MLD-fabricated high-power thin-film battery

2018 ◽  
Vol 6 (16) ◽  
pp. 7027-7033 ◽  
Author(s):  
Mikko Nisula ◽  
Maarit Karppinen
Keyword(s):  
Thin Film ◽  
High Performance ◽  
High Capacity ◽  
Reaction Rates ◽  
Power Sources ◽  
Thin Film Battery ◽  
Microelectronic Devices ◽  
Ultrathin Layers ◽  
Organic Electrode

We demonstrate that the high-capacity organic electrode material, p-benzoquinone, is able to sustain ultrahigh redox reaction rates without any conductive additives when applied as ultrathin layers in an all-solid-state thin-film battery setup, viable for e.g. high-performance power sources in microelectronic devices.

Flexible thin-film battery based on graphene-oxide embedded in solid polymer electrolyte

Nanoscale ◽  
2015 ◽  
Vol 7 (41) ◽  
pp. 17516-17522 ◽  
Author(s):  
M. Kammoun ◽  
S. Berg ◽  
H. Ardebili
Keyword(s):  
Thin Film ◽  
Graphene Oxide ◽  
Lithium Ion Battery ◽  
Polymer Electrolyte ◽  
Polyethylene Oxide ◽  
Solid Polymer Electrolyte ◽  
High Capacity ◽  
Lithium Ion ◽  
Solid Polymer ◽  
Thin Film Battery

A novel flexible thin-film lithium ion battery containing polyethylene oxide (PEO) with 1% graphene oxide (GO) nanosheets is fabricated that offers enhanced safety, flexibility, stability and high capacity.

Amorphous silicon–carbon based nano-scale thin film anode materials for lithium ion batteries

2011 ◽  
Vol 56 (13) ◽  
pp. 4717-4723 ◽  
Author(s):  
Moni Kanchan Datta ◽  
Jeffrey Maranchi ◽  
Sung Jae Chung ◽  
Rigved Epur ◽  
Karan Kadakia ◽  
...  
Keyword(s):  
Thin Film ◽  
Amorphous Silicon ◽  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Lithium Ion ◽  
Nano Scale ◽  
Silicon Carbon ◽  
Carbon Based
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