Surface micro-structuring of intercalation cathode materials for lithium-ion batteries: a study of laser-assisted cone formation

Pfleging, Wilhelm; Smyrek, Peter; Hund, Jonas; Bergfeldt, Thomas; Pröll, J.

doi:10.1117/12.2077763

Cited by 3 publications

(1 citation statement)

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“…The calibration data were derived from LIBS and inductively coupled plasma atomic emission spectroscopy (ICP-OES) as described in [31,33]. Lithium concentration and distribution related to C-rates were systematically investigated in structured and unstructured electrodes [26,[30][31][32][33]37].…”

Section: Laser-induced Breakdown Spectroscopymentioning

confidence: 99%

3D electrode architectures for high energy and high power lithium-ion batteries

Pfleging

2022

Energy Harvesting and Storage: Materials, Devices, and Applications XII

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There is worldwide a strong effort to increase energy and power density on battery level for future electric vehicles. In addition, the demand for cost efficient, reliable, and long lifetime lithium-ion batteries (LIB) is continuous increasing. For the development of next-generation LIB a new scientific-technical approach was established by merging the 3D battery concept with high mass-loaded electrodes. The 3D battery concept is realized by laser structuring of electrodes and has a huge impact on high rate capability and lifetime of lithium-ion batteries. In frame of process up-scaling, ultrafast laser ablation including roll-to-roll processing was established for thick film electrodes without damaging the active material. Post-mortem studies using laser-induced breakdown spectroscopy were carried out to study degradation processes and to illustrate the formation of new lithium diffusion pathways in 3D electrodes. The studies were performed with lithium nickel manganese cobalt oxide as cathode and graphite/silicon as anode. Silicon has the benefit to provide one order of magnitude higher gravimetric energy density than the common used graphite. However, a bottleneck of silicon is its huge volume change of 300 % during electrochemical cycling. High mechanical tension may arise, which results in crack formation, continuous formation of solid electrolyte interphase, and subsequent electrode delamination. It was shown that batteries with laser structured electrodes benefit from a homogenous lithiation and delithiation, reduced compressive stress, and overall improved electrochemical properties in comparison to batteries with unstructured electrodes. A new manufacturing tool is presented for next-generation battery production to overcome current limitations in electrode design and cell performance.

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Section: Laser-induced Breakdown Spectroscopymentioning

confidence: 99%

3D electrode architectures for high energy and high power lithium-ion batteries

Pfleging

2022

Energy Harvesting and Storage: Materials, Devices, and Applications XII

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Advanced Photonic Processes for Photovoltaic and Energy Storage Systems

et al. 2017

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Solar-energy harvesting through photovoltaic (PV) conversion is the most promising technology for long-term renewable energy production. At the same time, significant progress has been made in the development of energy-storage (ES) systems, which are essential components within the cycle of energy generation, transmission, and usage. Toward commercial applications, the enhancement of the performance and competitiveness of PV and ES systems requires the adoption of precise, but simple and low-cost manufacturing solutions, compatible with large-scale and high-throughput production lines. Photonic processes enable cost-efficient, noncontact, highly precise, and selective engineering of materials via photothermal, photochemical, or photophysical routes. Laser-based processes, in particular, provide access to a plethora of processing parameters that can be tuned with a remarkably high degree of precision to enable innovative processing routes that cannot be attained by conventional approaches. The focus here is on the application of advanced light-driven approaches for the fabrication, as well as the synthesis, of materials and components relevant to PV and ES systems. Besides presenting recent advances on recent achievements, the existing limitations are outlined and future possibilities and emerging prospects discussed.

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