التفاصيل البيبلوغرافية
| العنوان: |
Experimental and numerical analysis to identify the performance limiting mechanisms in solid-state lithium cells under pulse operating conditions. |
| المؤلفون: |
Pang MC; Department of Mechanical Engineering, Imperial College London, Exhibition Road, South Kensington Campus, London, SW7 2AZ, UK. gregory.offer@imperial.ac.uk., Hao Y, Marinescu M, Wang H, Chen M, Offer GJ |
| المصدر: |
Physical chemistry chemical physics : PCCP [Phys Chem Chem Phys] 2019 Oct 24; Vol. 21 (41), pp. 22740-22755. |
| نوع المنشور: |
Journal Article |
| اللغة: |
English |
| بيانات الدورية: |
Publisher: Royal Society of Chemistry Country of Publication: England NLM ID: 100888160 Publication Model: Print Cited Medium: Internet ISSN: 1463-9084 (Electronic) Linking ISSN: 14639076 NLM ISO Abbreviation: Phys Chem Chem Phys Subsets: PubMed not MEDLINE; MEDLINE |
| أسماء مطبوعة: |
Original Publication: Cambridge [England] : Royal Society of Chemistry, c1999- |
| مستخلص: |
Solid-state lithium batteries could reduce the safety concern due to thermal runaway while improving the gravimetric and volumetric energy density beyond the existing practical limits of lithium-ion batteries. The successful commercialisation of solid-state lithium batteries depends on understanding and addressing the bottlenecks limiting the cell performance under realistic operational conditions such as dynamic current profiles of different pulse amplitudes. This study focuses on experimental analysis and continuum modelling of cell behaviour under pulse operating conditions, with most model parameters estimated from experimental measurements. By using a combined impedance and distribution of relaxation times analysis, we show that charge transfer at both interfaces occurs between the microseconds and milliseconds timescale. We also demonstrate that a simplified set of governing equations, rather than the conventional Poisson-Nernst-Planck equations, are sufficient to reproduce the experimentally observed behaviour during pulse discharge, pulse charging and dynamic pulse. Our simulation results suggest that solid diffusion in bulk LiCoO2 is the performance limiting mechanism under pulse operating conditions, with increasing voltage loss for lower states of charge. If bulk electrode forms the positive electrode, improvement in the ionic conductivity of the solid electrolyte beyond 10-4 S cm-1 yields marginal overall performance gains due to this solid diffusion limitation. Instead of further increasing the electrode thickness or improving the ionic conductivity on their own, we propose a holistic model-based approach to cell design, in order to achieve optimum performance for known operating conditions. |
| تواريخ الأحداث: |
Date Created: 20190926 Date Completed: 20191025 Latest Revision: 20200108 |
| رمز التحديث: |
20231215 |
| DOI: |
10.1039/c9cp03886h |
| PMID: |
31552951 |
| قاعدة البيانات: |
MEDLINE |
