An in-situ gas chromatography investigation into the suppression of oxygen gas evolution by coated amorphous cobalt-phosphate nanoparticles on oxide electrode

Gim, Jihyeon; Song, Jinju; Kim, Sungjin; Jo, Jeonggeun; Kim, Seokhun; Yoon, Jaegu; Kim, Donghan; Hong, Suk-Gi; Park, Jin-Hwan; Mathew, Vinod; Han, Junhee; Song, Sun‐Ju; Kim, Jaekook

doi:10.1038/srep23394

Cited by 7 publications

(2 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Metal phosphates series, such as AlPO4 [122,[191][192][193][194], Co3(PO4)2 [30,140], CoPO4 [195], NiPO4 [196], LiPO4 [197], Mn3(PO4)2 [124], CePO4 [198], and NaTi2(PO4)3 [199]…”

Section: (C) Amorphous Materialsmentioning

confidence: 99%

See 1 more Smart Citation

LiNixCoyMnzO2 cathode materials for lithium (-ion) batteries

Жен¹

View full text Add to dashboard Cite

The current state-of-the-art lithium ion batteries (LIBs) have dominated the small format battery market for portable electronic devices， i.e., 3C products, namely, computer, communication and consumer electronics. The implementation of such technologies into automotive like hybrid (HEVs), plugin (PHEVs), or fully battery electric vehicles (BEVs) is also quite successful. However, the realization of pure electrical propulsion requires battery materials that enable high energies to meet demands of a ∼500 km driving range, and a 10-year lifetime with driving range of 250,000 km. To achieve such a goal, the key challenge for both chemists and electrochemical engineers lies in increasing the battery energy density, while retains a long cycle life. At the moment, cathode materials remain the bottleneck due to their rather low capacity, compared with anode materials (generally graphite). Among all the common cathode materials, layered LiNixCoyMnzO2 (NCM) has overwhelming advantages for its high reversible capacity, rather low cost, good environmental benignity and high structural stability. However, the current NCM still suffers from two notable shortcomings: 1) poor rate capability especially at high Crates due to rather sluggish Li + diffusion kinetics; 2) fatal capacity degradation upon prolonged cycles mainly resulting from side reactions between electrode and electrolyte. Therefore, further improvements are highly desired to address these issues and satisfy the requirements for practical applications. Bearing these targets in mind, the main aims of my Ph.D. project are: 1) synthesis of NCM cathode materials with high Crate capability and stable long-term cyclability; 2) demonstration of their practical feasibility in full cell applications, both by fabricating full lithium-ion cells with a combination of our modified cathode electrode, and via directly employing metallic lithium as anode electrode to assemble lithium metal cells (in ionic liquid electrolyte system). To address the issue of poor Crate capability, we employed a strategy of preparation of 1D bar-like LiNi0.4Co0.2Mn0.

show abstract

“…Metal phosphates series, such as AlPO4 [122,[191][192][193][194], Co3(PO4)2 [30,140], CoPO4 [195], NiPO4 [196], LiPO4 [197], Mn3(PO4)2 [124], CePO4 [198], and NaTi2(PO4)3 [199]…”

Section: (C) Amorphous Materialsmentioning

confidence: 99%

“…For these reasons, MnPO4 appears as a very powerful coating material due to its natural abundance and environmental benignity as well as its high structural and thermal stability [124,252]. Considering recent results for cobalt phosphate coatings [195]…”

Section: Introductionmentioning

confidence: 99%

LiNixCoyMnzO2 cathode materials for lithium (-ion) batteries

Жен¹

View full text Add to dashboard Cite

show abstract

Scavenging Materials to Stabilize LiPF₆‐Containing Carbonate‐Based Electrolytes for Li‐Ion Batteries

et al. 2018

View full text Add to dashboard Cite

In conjunction with electrolyte additives used for tuning the interfacial structures of electrodes, functional materials that eliminate or deactivate reactive substances generated by the degradation of LiPF6‐containing electrolytes in lithium‐ion batteries offer a wide range of electrolyte formulation opportunities. Herein, the recent advancements in the development of: (i) scavengers with high selectivity and affinity toward unwanted species and (ii) promoters of ion‐paired LiPF6 dissociation are highlighted, showing that the utilization of the above additives can effectively mitigate the problem of electrolyte instability that commonly results in battery performance degradation and lifetime shortening. A deep mechanistic understanding of LiPF6‐containing electrolyte failure and the action of currently developed additives is demonstrated to enable the rational design of effective scavenging materials and thus allow the fabrication of highly reliable batteries.

show abstract

MnPO₄‐Coated Li(Ni_0.4Co_0.2Mn_0.4)O₂ for Lithium(‐Ion) Batteries with Outstanding Cycling Stability and Enhanced Lithiation Kinetics

Chen

Kim

Bresser

et al. 2018

Advanced Energy Materials

View full text Add to dashboard Cite

Herein, the successful synthesis of MnPO4‐coated LiNi0.4Co0.2Mn0.4O2 (MP‐NCM) as a lithium battery cathode material is reported. The MnPO4 coating acts as an ideal protective layer, physically preventing the contact between the NCM active material and the electrolyte and, thus, stabilizing the electrode/electrolyte interface and preventing detrimental side reactions. Additionally, the coating enhances the lithium de‐/intercalation kinetics in terms of the apparent lithium‐ion diffusion coefficient. As a result, MP‐NCM‐based electrodes reveal greatly enhanced C‐rate capability and cycling stability—even under exertive conditions like extended operational potential windows, elevated temperature, and higher active material mass loadings. This superior electrochemical behavior of MP‐NCM compared to as‐synthesized NCM is attributed to the superior stability of the electrode/electrolyte interface and structural integrity when applying a MnPO4 coating. Employing an ionic liquid as an alternative, intrinsically safer electrolyte system allows for outstanding cycling stabilities in a lithium‐metal battery configuration with a capacity retention of well above 85% after 2000 cycles. Similarly, the implementation in a lithium‐ion cell including a graphite anode provides stable cycling for more than 2000 cycles and an energy and power density of, respectively, 376 Wh kg−1 and 1841 W kg−1 on the active material level.

show abstract

An in-situ gas chromatography investigation into the suppression of oxygen gas evolution by coated amorphous cobalt-phosphate nanoparticles on oxide electrode

Cited by 7 publications

References 33 publications

LiNixCoyMnzO2 cathode materials for lithium (-ion) batteries

LiNixCoyMnzO2 cathode materials for lithium (-ion) batteries

Scavenging Materials to Stabilize LiPF₆‐Containing Carbonate‐Based Electrolytes for Li‐Ion Batteries

MnPO₄‐Coated Li(Ni_0.4Co_0.2Mn_0.4)O₂ for Lithium(‐Ion) Batteries with Outstanding Cycling Stability and Enhanced Lithiation Kinetics

Contact Info

Product

Resources

About

An in-situ gas chromatography investigation into the suppression of oxygen gas evolution by coated amorphous cobalt-phosphate nanoparticles on oxide electrode

Cited by 7 publications

References 33 publications

LiNixCoyMnzO2 cathode materials for lithium (-ion) batteries

LiNixCoyMnzO2 cathode materials for lithium (-ion) batteries

Scavenging Materials to Stabilize LiPF6‐Containing Carbonate‐Based Electrolytes for Li‐Ion Batteries

MnPO4‐Coated Li(Ni0.4Co0.2Mn0.4)O2 for Lithium(‐Ion) Batteries with Outstanding Cycling Stability and Enhanced Lithiation Kinetics

Contact Info

Product

Resources

About

Scavenging Materials to Stabilize LiPF₆‐Containing Carbonate‐Based Electrolytes for Li‐Ion Batteries

MnPO₄‐Coated Li(Ni_0.4Co_0.2Mn_0.4)O₂ for Lithium(‐Ion) Batteries with Outstanding Cycling Stability and Enhanced Lithiation Kinetics