Designing reliable electrochemical cells for operando lithium-ion battery study

Su, Laisuo; Choi, Phillip; Parimalam, Bharathy S.; Litster, Shawn; Reeja‐Jayan, B.

doi:10.1016/j.mex.2021.101562

Cited by 7 publications

(7 citation statements)

References 4 publications

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“…The development and assembling process of window coin cells have been outlined in previous studies. [24,25] Cells with LiNiO 2 electrodes in different electrolytes were prepared in the lab and shipped to Argonne National Laboratory for XRD characterization at the Advanced Photon Source beamlines 11-ID-B and 11-ID-C. The X-ray energies were 58.7 (11-ID-B) and 105.7 keV (11-ID-C).…”

Section: Methodsmentioning

confidence: 99%

“…Window coin cells were designed for the operando measurements and their applicability has previously been demonstrated. [24,25] Synchrotron X-rays were scattered by all components within the window coin cell in the beam path, with their diffraction patterns combined into a single XRD pattern. Figure S8, Supporting Information, displays an operando XRD measurement of a fresh LiNiO 2 cell with the LP57 electrolyte.…”

Section: Tracking the Phase Transitions During The Cycling Of Liniomentioning

confidence: 99%

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Stabilizing High‐Nickel Cathodes with High‐Voltage Electrolytes

Jarvis

Charalambous

et al. 2023

Adv Funct Materials

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Electrolytes connect the two electrodes in a lithium battery by providing Li + transport channels between them. Advanced electrolytes are being explored with high-nickel cathodes and the lithium-metal anode to meet the high energy density and cycle life goals, but the origin of the performance differences with different electrolytes is not fully understood. Here, the mechanisms involved in protecting the high-capacity, cobalt-free cathode LiNiO 2 with a model high-voltage electrolyte (HVE) are delineated. The kinetic barrier posed by a thick surface degradation layer with poor Li + -ion transport is found to be the major contributor to the fast capacity fade of LiNiO 2 with the conventional carbonate electrolyte. In contrast, HVE reduces the side reactions between the electrolyte and the electrodes, leading to a thinner nano-interphase layer comprised of more beneficial species. Crucially, the HVE leads to a different surface reorganization pathway involving the formation of a thinner nanoscale LiNi 2 O 4 spinel phase on the LiNiO 2 surface. With a high 3D Li + -ion and electronic conductivity, the spinel LiNi 2 O 4 reorganization nanolayer preserves fast Li + transport across the cathode-electrolyte interface, reduces reaction heterogeneity in the electrode and alleviates intergranular cracking within secondary particles, resulting in superior long-term cycle life.

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Section: Methodsmentioning

confidence: 99%

Section: Tracking the Phase Transitions During The Cycling Of Liniomentioning

confidence: 99%

Stabilizing High‐Nickel Cathodes with High‐Voltage Electrolytes

Jarvis

Charalambous

et al. 2023

Adv Funct Materials

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“…The windows were sealed with Al foil (12 μm thick) and Cu foil (9 μm thick), respectively, on the cathode side and the anode side. An epoxy composed of Eccobond 45 and Catalyst 15 with a ratio of 1:1 in volume was applied to allow a reliable sealing, as demonstrated in previous publications 41 , 45 . Two discs of Na metal were used as both the ion source and as the spacer to maintain good mechanical contact with the sulfur electrode.…”

Section: Methodsmentioning

confidence: 99%

Intercalation-type catalyst for non-aqueous room temperature sodium-sulfur batteries

He,

Bhargav,

et al. 2023

Nat Commun

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Ambient-temperature sodium-sulfur (Na-S) batteries are potential attractive alternatives to lithium-ion batteries owing to their high theoretical specific energy of 1,274 Wh kg−1 based on the mass of Na2S and abundant sulfur resources. However, their practical viability is impeded by sodium polysulfide shuttling. Here, we report an intercalation-conversion hybrid positive electrode material by coupling the intercalation-type catalyst, MoTe2, with the conversion-type active material, sulfur. In addition, MoTe2 nanosheets vertically grown on graphene flakes offer abundant active catalytic sites, further boosting the catalytic activity for sulfur redox. When used as a composite positive electrode and assembled in a coin cell with excess Na, a discharge capacity of 1,081 mA h gs−1 based on the mass of S with a capacity fade rate of 0.05% per cycle over 350 cycles at 0.1 C rate in a voltage range of 0.8 to 2.8 V is realized under a high sulfur loading of 3.5 mg cm−2 and a lean electrolyte condition with an electrolyte-to-sulfur ratio of 7 μL mg−1. A fundamental understanding of the electrocatalysis of MoTe2 is further revealed by in-situ synchrotron-based operando X-ray diffraction and ex-situ time-of-flight secondary ion mass spectrometry.

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“…However, the measurement quality of the interior of the cell is often poor due to the attenuation of the x-ray radiation by the metallic battery casing [150]. To reduce x-ray attenuation, some researchers design special battery casings [151][152][153]. These solutions introduce an x-ray penetrable window, often made of materials like kapton or thin metal films, to minimize attenuation from the case in the resulting x-ray image.…”

Section: Radiological Imagingmentioning

confidence: 99%

“…As a result, the expansion behaviour and cell performance might be affected, meaning results may not be entirely similar to those from conventional commercial cells. Even with the special casings, it is often necessary to use synchrotron generated beams to achieve the required contrast in imaging [151,153].…”

Section: Radiological Imagingmentioning

confidence: 99%

Methods for Quantifying Expansion in Lithium-Ion Battery Cells Resulting from Cycling: A Review

Krause,

Nusko,

Pitta Bauermann

et al. 2024

Preprint

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Significant efforts are being made across academia and industry to better characterize lithium-ion battery cells as reliance on the technology for applications ranging from green energy storage to electric mobility increases. The measurement of short-term and long-term volume expansion in lithium-ion battery cells is relevant for several reasons. For instance, it provides information about the quality and homogeneity of battery cells during charge and discharge cycles, as well as aging over it’s lifetime. The expansion measurements are useful for the evaluation of new materials and the improvement of end-of-line quality tests during cell production. These measurements may also indicate the safety of battery cells by aiding in predicting state of charge and state of health over the lifetime of the cell. Expansion measurements can also assess inhomogeneities on the electrodes and defects such as gas accumulation and lithium plating. In this review, we first establish the known mechanisms through which short term and long term volume expansion in lithium-ion battery cells occurs. We then explore the current state-of-the-art for both contact and non-contact measurements of volume expansion. This review compiles existing literature to outline the various options available to researchers aiming to make ex situ volume expansion measurements by doing post mortem analyses on individual components and in operando measurements on entire battery cells. Finally, we discuss the different considerations when selecting an appropriate measurement technique. The selection of the optimal method for measuring battery cell expansion depends on the objective of the characterization, duration, required resolution, and repeatability of results. Costs and required space for the measurement equipment are also considered.

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Designing reliable electrochemical cells for operando lithium-ion battery study

Cited by 7 publications

References 4 publications

Stabilizing High‐Nickel Cathodes with High‐Voltage Electrolytes

Stabilizing High‐Nickel Cathodes with High‐Voltage Electrolytes

Intercalation-type catalyst for non-aqueous room temperature sodium-sulfur batteries

Methods for Quantifying Expansion in Lithium-Ion Battery Cells Resulting from Cycling: A Review

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