Improved potassium ion storage performance of graphite by atomic layer deposition of aluminum oxide coatings

Chen, Jin‐Feng; He, Xiaodong; Li, De‐Jun; Feng, Jianmin

doi:10.1002/er.5141

Cited by 13 publications

(12 citation statements)

References 47 publications

(93 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…ALD is a well-established method extensively used in the semiconductor industry to produce chemically tuneable, highly conformal films with atomic-scale thickness control. ALD has been used to deposit ASEI layers for chemical protection of graphite anodes, 33,34 Li metal anodes, [35][36][37][38][39] cathodes, [40][41][42][43][44][45][46] and other solid electrolyte pellets. 47 We select LiPON as an ASEI due to its large electrochemical stability window (5.5 V vs. Li + /Li), allowing use with both high voltage cathodes and Li metal anodes, and an acceptable ionic conductivity of B10 À6 S cm À1 .…”

Section: Introductionmentioning

confidence: 99%

Differentiating chemical and electrochemical degradation of lithium germanium thiophosphate and the role of atomic layer deposited protection layers

et al. 2022

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Differentiating chemical and electrochemical degradation of lithium germanium thiophosphate and the role of atomic layer deposited protection layers

et al. 2022

View full text Add to dashboard Cite

show abstract

“…[ 20 ] During the following anodic scan, the distinct wide peak at 0.4 V with a shoulder at 0.55 V indicates the extraction of K‐ions from the MCMB lattice (de‐potassiation process). [ 20,24 ]…”

Section: Resultsmentioning

confidence: 99%

“…[20] During the following anodic scan, the distinct wide peak at 0.4 V with a shoulder at 0.55 V indicates the extraction of K-ions from the MCMB lattice (de-potassiation process). [20,24] The CV curves (Figure 3b) of the MCMB electrode in E2 electrolyte are very different from the CV curve of the MCMB electrode in E1 electrolyte, indicating a totally different K-ions intercalation/de-intercalation mechanisms. These results are also consistent with the GCD profiles in Figure 2b.…”

Section: K-ions Storage Kinetics Of the Mcmb Electrodes In Varied Ele...mentioning

confidence: 95%

Mechanistic Insights into the Intercalation and Interfacial Chemistry of Mesocarbon Microbeads Anode for Potassium Ion Batteries

Wang

Zhang

et al. 2021

Small

View full text Add to dashboard Cite

electrolyte price (for example, KPF 6 is 20 times cheaper than LiPF 6 ) and the relatively low redox potential of K/K + (−2.93 V vs SHE, which is close to that of Li/Li + (−3.04 V vs SHE) and lower than that of Na/Na + (−2.71 V vs SHE)). [3,5] These advantages make PIBs promising alternatives to the state-of-the-art LIBs.The research and development of PIBs is still at an infant stage. In 2015, Ji et al. firstly investigated the commercial graphite anode materials to store K-ions in conventional carbonate electrolyte of 0.8 m KPF 6 in ethylene carbonate (EC) and diethyl carbonate (DEC). [6] The sequential staging-behavior of graphite anode, namely experiencing three stages from C to KC 36 (stage III), KC 24 (stage II), and KC 8 (stage I), was confirmed via ex-situ investigations, which showed an average intercalating voltage plateau at 0.2 V versus K/K + . The moderate rate capability and rapid capacity fading were also revealed in this pioneering report. Similar electrochemical intercalation behaviors were also firstly demonstrated by Hu and co-workers and Komaba and co-workers simultaneously. [7,8] However, they presented relatively good cyclability and rate-capability with high reversible capacity of above 200 mAh g −1 when using the electrolytes containing potassium bis(fluorosulfonyl)amide (KFSI) and EC-DEC solvents. [7] Kang and co-workers explored the solvated K-ions co-intercalation into graphite anodes when using the ether-based electrolytes of 1.0 m KCF 3 SO 3 in diethylene glycol dimethyl ether (DEGDME). [9] Similar staging behavior was observed, although it showed varied intercalation voltage (at around 0.9 V vs K/K + ) and reversible capacity of around 100 mAh g −1 . Recently, Niu and co-workers also revealed that the graphite anodes with a solvated-K-ions co-intercalation mechanism can well operate with 3800 cycles using 1.0 m KPF 6 in 1,2-dimethoxyethane (DME) electrolyte. [10] These preliminary achievements open the door to advance the carbon-based anodes for PIBs.Electrolyte chemistry also plays a key role in achieving high reversible capacity, good rate and cycle performances. [11] In a recent study, Lu and co-workers demonstrated that the graphite anode was able to operate for >2000 cycles when utilizing a high concentrated electrolyte of KN(SO 2 F) 2 /ethyl Mesocarbon microbeads (MCMB) are highly desirable as anode materials for rechargeable potassium ion batteries (PIBs) due to their commercially availability, high stability and low-cost. However, their charge storage and interfacial mechanisms are still unclear. In this work, the intercalation mechanisms and the solid-electrolyte-interphase (SEI) formation of the MCMB in four different electrolytes is comprehensively studied. The MCMB anodes exhibit superior rate and cycle performances via a naked K-ions sequentially staging intercalation mechanism, realizing the complete transformation from graphite to KC 8 . Whereas a solvated K-ions co-intercalation mechanism of the MCMB occurs in ether-based electrolytes, which might induce graphite exf...

show abstract

“…In addition to the progresses discussed above for LIBs, lithium metal batteries, and 3D solid-state microbatteries, there have some new trends emerging for other beyond LIB systems, including sodium-based [20], zinc-based [113], potassiumbased [156], aluminum-based [114], and magnesium-based batteries [157]. Meng has made an updated overview of ALD for SIBs [20].…”

Section: Reviewmentioning

confidence: 99%

Atomic and molecular layer deposition in pursuing better batteries

Meng

2021

Journal of Materials Research

View full text Add to dashboard Cite

In the past decade, atomic and molecular layer deposition (ALD and MLD), these two sister techniques have been attracting more and more research attention to address technical challenges in various advanced battery systems. The charm of both ALD and MLD lies in their unique mechanism for growing a large variety of functional materials, featuring uniform and conformal films enabled at the atomic/molecular level at low temperature. Using ALD and MLD, to date, there have been many excitements achieved in research. These will ultimately be reflected on technical innovations that will help revolutionize our lifestyles. This invited article gives the first comprehensive review briefing on the journey of ALD and MLD in pursuing better batteries and highlighting many exciting progresses in various advanced battery systems. It is expected that this review will help boost many more efforts in using ALD and MLD for new battery technologies in the coming decade.

show abstract

Improved potassium ion storage performance of graphite by atomic layer deposition of aluminum oxide coatings

Cited by 13 publications

References 47 publications

Differentiating chemical and electrochemical degradation of lithium germanium thiophosphate and the role of atomic layer deposited protection layers

Differentiating chemical and electrochemical degradation of lithium germanium thiophosphate and the role of atomic layer deposited protection layers

Mechanistic Insights into the Intercalation and Interfacial Chemistry of Mesocarbon Microbeads Anode for Potassium Ion Batteries

Atomic and molecular layer deposition in pursuing better batteries

Contact Info

Product

Resources

About