Superior Performances of B-doped LiNi0.84Co0.10Mn0.06O2 cathode for advanced LIBs

Lee, Seunghwan; Jin, Bong‐Soo; Kim, Hyunsoo

doi:10.1038/s41598-019-54115-z

Cited by 29 publications

(25 citation statements)

References 28 publications

(36 reference statements)

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“…[70] Surface texturing has been observed by others. [71] Likewise, the presence of MACl determined the quality of the film surface in the case of Cs 0.15 (FA 0.83 MA 0.17 ) 0.85 PbI 3-x Br x films produced through anti-solvent crystallization. More specifically, without MACl, the films have shown a unimodal grain size distribution along with a rough surface with many micrometer-sized wrinkles.…”

Section: Making Monolithic Single-crystal-like Filmsmentioning

confidence: 99%

“…[72] Very similar results with lower trap density upon MACl addition in MAPbI 3 perovskites were drawn from space-charge-limited current or impedance spectroscopy measurements. [67,71] In any case, we should highlight here the fact that when a second chloride salt (methylammonium acetate, MAH 2 PO 2 , and CsCl) was added in MACl-excessive perovskites, a better passivation effect was observed in comparison with MACl-only additive. [64,65,72,76] Remarkably, MAH 2 PO 2 -only additive, which is the product of the reaction of H 3 PO 2 with methylamine, [77] already presented a lower density of defects at grain boundaries in comparison with MACl.…”

Section: Defect Passivationmentioning

confidence: 99%

“…size and higher amount of the intermediate which is more difficult to transform to the perovskite. [71] In general, PCEs of around 18-19% could be easily attained in the presence of MACl in both planar or mesoporous-based electrodes. [65][66][67] Slightly higher efficiencies of 19-20% were recently reported for mixed-cation perovskites through the addition of excess of 5-20% MACl (molar ratio in relation to Pb 2+ ).…”

Section: Record Photovoltaic Efficiencies With Multi-elemental 3d Permentioning

confidence: 99%

“…When no MACl was present in the precursor solution, the devices were losing more than 20% of their starting PCE ( Figure 11). [71] The reasons behind the stability enhancement could be twofold: 1) the full coverage and large grain size ensures the absence of pinholes from which moisture or oxygen ingress could take place, [100] and 2) reduced and passivated grain boundaries limit the main degradation routes to react with H 2 O and O 2 . [101][102][103]…”

Section: Stabilitymentioning

confidence: 99%

See 3 more Smart Citations

Μethylammonium Chloride: A Key Additive for Highly Efficient, Stable, and Up‐Scalable Perovskite Solar Cells

Kosmatos

Theofylaktos

Giannakaki

et al. 2019

Energy & Environ Materials

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Lead halide perovskites of the type APbX3 (where A = methylammonium MA, formamidinium FA, or cesium and X = iodide and bromide), in a single‐crystal form or more often as polycrystalline films, have already shown unique optoelectronic properties, comparable with those of the best single‐crystal semiconductors. To form a properly crystalline iodide or iodide/bromide, perovskite and achieve high performance in solar cells, sources containing only iodide and bromide salts (PbI2, PbBr2, MAI, FAI, CsI, MABr) are typically used as precursor materials. However, recently, most of the record perovskites contain MACl as additive to control their crystallization, revisiting the importance of methylammonium cation excess and chloride incorporation in perovskites, previously highlighted by Snaith's group back in 2012. Here, we review the background and recent progress in MACl‐mediated crystallization of perovskites, as well as the impact of the additive in solar cells. In particular, we describe the current understanding of the mechanism of perovskite crystallization process and defect passivation at grain boundaries in the presence of MACl. We then discuss the spectacular results (in terms of record efficiencies, stability, and up‐scaling) that have been delivered by solar cells employing MACl‐incorporated perovskites, and give an outlook of future research avenues that might bring perovskite solar cells closer to commercialization.

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Section: Making Monolithic Single-crystal-like Filmsmentioning

confidence: 99%

Section: Defect Passivationmentioning

confidence: 99%

Section: Record Photovoltaic Efficiencies With Multi-elemental 3d Permentioning

confidence: 99%

Section: Stabilitymentioning

confidence: 99%

See 2 more Smart Citations

Μethylammonium Chloride: A Key Additive for Highly Efficient, Stable, and Up‐Scalable Perovskite Solar Cells

Kosmatos

Theofylaktos

Giannakaki

et al. 2019

Energy & Environ Materials

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“…ZrO 2 -0.5 (0.151 V) gives decreased polarization compared to PNCM (0.275 V). It is indicated that Zr modification can improve lithiation/delithiation reversibility …”

Section: Results and Discussionmentioning

confidence: 99%

Use of Zirconium Dual-Modification on the LiNi_0.8Co_0.1Mn_0.1O₂ Cathode for Improved Electrochemical Performances of Lithium-Ion Batteries

Hwang

Lee

2021

ACS Appl. Energy Mater.

Self Cite

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A ZrO2-coated and Zr-doped LiNi0.8Co0.1Mn0.1O2 cathode is successfully fabricated, and its electrochemical performances are evaluated. The 0.5 wt % ZrO2-coated and Zr-doped LiNi0.8Co0.1Mn0.1O2 cathode exhibits excellent electrochemical performances compared to the pristine LiNi0.8Co0.1Mn0.1O2. The 0.5 wt % ZrO2-coated and Zr-doped LiNi0.8Co0.1Mn0.1O2 cathode shows a high discharge capacity of 220.9 mA h g–1. Moreover, it maintains a capacity retention of 76.1% after 60 cycles. Most importantly, it has extraordinary retention capacities of 76.7 and 59.1% at 4.0 and 6.0 C, respectively. This is because ZrO2 coating and Zr doping contribute to rapid Li+ conductivity and good structural stability. Thus, the LiNi0.8Co0.1Mn0.1O2 cathode with a suitable amount of ZrO2 coating and Zr doping is considered a good candidate for state-of-the-art Li-ion batteries.

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Insights into the Microstructural Engineering of Cobalt‐Free, High‐Nickel Cathodes Based on Surface Energy for Lithium‐Ion Batteries

Kim

Shin

et al. 2023

Advanced Energy Materials

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In order to reduce cost and increase energy density, it is critical to eliminate cobalt and increase nickel content in practicalLiNi 1−x−y Mn x Co y O 2 (NMC) and LiNi 1−x−y Co x Al y O 2 (NCA) cathodes. However, the implementation of cobalt-free, high-nickel layered oxide cathodes in lithium-ion batteries (LIBs) is hindered by the inherent issue of high surface reactivity with the electrolyte and microcrack formation during cycling. Herein, the origin of key parameters for microstructural engineering in cobalt-free LiNiO 2 (LNO) is comprehensively investigated with two representative dopants, B and Al. A notable difference in the segregation energy between B and Al results in different morphologies of LNO particles. The low solubility of B into the host structure leads to a surface-confined distribution of B, inhibiting the growth of primary particles, whereas the highly soluble Al facilitates primary particle growth. Recognition of this key parameter can help improve the cycle life of cobalt-free LIBs via microstructural engineering by increasing the aspect ratio inside the cathode particle. It is demonstrated that boron-doping in LNO (B-LNO) is the most effective dopant strategy for microstructural engineering of the primary particles. The B-LNO exhibits an excellent capacity retention of 81% in full cells after 300 cycles compared to both LNO and Al-doped LNO (Al-LNO).

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Superior Performances of B-doped LiNi0.84Co0.10Mn0.06O2 cathode for advanced LIBs

Cited by 29 publications

References 28 publications

Μethylammonium Chloride: A Key Additive for Highly Efficient, Stable, and Up‐Scalable Perovskite Solar Cells

Μethylammonium Chloride: A Key Additive for Highly Efficient, Stable, and Up‐Scalable Perovskite Solar Cells

Use of Zirconium Dual-Modification on the LiNi_0.8Co_0.1Mn_0.1O₂ Cathode for Improved Electrochemical Performances of Lithium-Ion Batteries

Insights into the Microstructural Engineering of Cobalt‐Free, High‐Nickel Cathodes Based on Surface Energy for Lithium‐Ion Batteries

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Superior Performances of B-doped LiNi0.84Co0.10Mn0.06O2 cathode for advanced LIBs

Cited by 29 publications

References 28 publications

Μethylammonium Chloride: A Key Additive for Highly Efficient, Stable, and Up‐Scalable Perovskite Solar Cells

Μethylammonium Chloride: A Key Additive for Highly Efficient, Stable, and Up‐Scalable Perovskite Solar Cells

Use of Zirconium Dual-Modification on the LiNi0.8Co0.1Mn0.1O2 Cathode for Improved Electrochemical Performances of Lithium-Ion Batteries

Insights into the Microstructural Engineering of Cobalt‐Free, High‐Nickel Cathodes Based on Surface Energy for Lithium‐Ion Batteries

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Use of Zirconium Dual-Modification on the LiNi_0.8Co_0.1Mn_0.1O₂ Cathode for Improved Electrochemical Performances of Lithium-Ion Batteries