NiCo2O4@La0.8Sr0.2MnO3 core–shell structured nanorods as efficient electrocatalyst for Li O2 battery with enhanced performances

Luo, Yong; Lu, Fanliang; Jin, Chao; Wang, Yarong; Yang, Ruizhi; Yang, Chenghao

doi:10.1016/j.jpowsour.2016.04.047

Cited by 43 publications

(43 citation statements)

References 44 publications

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“…These results clearly confirm the excellent stability and feasibility of the freestanding NiCo 2 S 4 @NiO when acted as electrodes in Li-O 2 batteries. [35,[39][40][41][42][43][44][45][46][47] For all the observed electrochemical results, it can be inferred that NiCo 2 S 4 @NiO shows much superiority as an efficient bifunctional catalyst in aprotic Li-O 2 batteries by virtue of catalytic activity synergistically strengthened by NiCo 2 S 4 and NiO. To make sure the absolute recovery of discharge products and ameliorate the oxygen reduction/evolution reversibility of Li-O 2 batteries, we examine the 2032 cells with a limited depth of discharge/charge.…”

Section: Electrochemical Performance Of Electrocatalysts In Li-o 2 Bamentioning

confidence: 99%

Hierarchical NiCo₂S₄@NiO Core–Shell Heterostructures as Catalytic Cathode for Long‐Life Li‐O₂ Batteries

Wang

Dong

et al. 2019

Advanced Energy Materials

139

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vehicles. In a typical electrochemical reaction, the discharge product of lithium peroxide (Li 2 O 2 ) can reversibly form and decompose on cathode side during oxygen reduction reaction (ORR) and subsequent oxygen evolution reaction (OER) processes, respectively (O 2 + 2Li + + 2e − ↔ Li 2 O 2 ). [1][2][3][4] Nevertheless, several critical barriers embracing unsatisfactory charge/discharge polarization, poor rate capability, and limited cycle life make the fantastic technology far from practical application, which can be mainly attributed to the intrinsic characteristic of discharge products including insulation property and insolubilization in aprotic electrolytes. During ORR process, Li 2 O 2 precipitations clog the eversmooth passageways of reactants and passivate electrode surfaces, deteriorating electrical connection between catalysts and efficient active sites, raising charge transfer impedance. In OER process, the insulating Li 2 O 2 precipitations are knotty to be composed, delivering unsatisfactory dynamic performance and triggering higher overpotential. [5][6][7][8][9][10] It has been well established that the morphology and distribution of Li 2 O 2 determined by different growth pathway during ORR govern the battery chemistry and hence the electrochemical performance. [11][12][13] Recent works demonstrate that large-sized Li 2 O 2 aggregations (large discs, [14,15] toroids, [16][17][18][19] spheres, [20,21] etc.) contribute to large discharge capacity output during ORR but at the cost of huge charge overpotential during OER, because large sized Li 2 O 2 products do not usually well contact with active sites and are not easily decomposed, thus resulting in a larger charging voltage gap and sluggish charging kinetics. On the contrary, the formation of conformal Li 2 O 2 films or small amorphous Li 2 O 2 particles during ORR can offer much smaller charge transfer resistance and thus improve kinetics performance obviously during the following charge process. [22][23][24][25] Unfortunately, under such condition, the exposed active sites of catalyst matrix would be inactivated quickly, hence leading to a lower discharge capacity. To alleviate this contradiction between large ORR capacity and small OER voltage gap, it mainly focuses on oxygen catalytic cathode to construct elaborate hierarchical porous structures and optimize microstructure of highly efficient dual-catalystThe critical challenges of Li-O 2 batteries lie in sluggish oxygen redox kinetics and undesirable parasitic reactions during the oxygen reduction reaction and oxygen evolution reaction processes, inducing large overpotential and inferior cycle stability. Herein, an elaborately designed 3D hierarchical heterostructure comprising NiCo 2 S 4 @NiO core-shell arrays on conductive carbon paper is first reported as a freestanding cathode for Li-O 2 batteries. The unique hierarchical array structures can build up multidimensional channels for oxygen diffusion and electrolyte impregnation. A built-in interfacial potential between NiCo 2 S 4 and NiO c...

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Section: Electrochemical Performance Of Electrocatalysts In Li-o 2 Bamentioning

confidence: 99%

Hierarchical NiCo₂S₄@NiO Core–Shell Heterostructures as Catalytic Cathode for Long‐Life Li‐O₂ Batteries

Wang

Dong

et al. 2019

Advanced Energy Materials

139

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“…Compared with these materials, the ternary spinel oxide NiCo 2 O 4 has aroused much interest for use as an electrocatalyst for Li-O 2 batteries thanks to its good electronic conductivity and catalytic activity. [115,116] So far, various kinds of NiCo 2 O 4 -based electrocatalyst are reported, [117][118][119][120][121][122] including hierarchical NiCo 2 O 4 nanorods, [117] hierarchical macroporous/ mesoporous NiCo 2 O 4 nanosheets, [118] have been reported. As a typical example among these researches, Gong et al has reported a high-loading NiCo 2 O 4 nanoparticles (NCONP) anchored on three-dimensional N-doped graphene as an efficient bifunctional catalyst for Li-O 2 battery.…”

Section: Noble Metal Metal Oxides and Other Electrocatalystsmentioning

confidence: 99%

“…Benefiting from these special architectures features and intrinsic materials, the NCO@N-rGO cathode delivers a high specific capacity (6716 mA h g −1 ), great rate performance, and excellent cycling stability with cutoff capacity of 1000 mA h g −1 (112 cycles) in the lithium− oxygen batteries. In addition, NiCo 2 O 4 @La 0.8 Sr 0.2 MnO 3 coreshell structured nanorods and self-assembled 3D foam-like NiCo 2 O 4 , [121,122] are reported by Yang et al and Wu et al, respectively, both of which have exhibited desirable performances in terms of the rate capability and cycling stability. To a certain degree, all of these researches have evidenced the promising application of NiCo 2 O 4 as efficient electrocatalyst in Li-O 2 battery.…”

Section: Noble Metal Metal Oxides and Other Electrocatalystsmentioning

confidence: 99%

Recent Progress in Electrocatalyst for Li‐O₂ Batteries

Zhou

Zhang

2017

Advanced Energy Materials

248

153

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In the Li‐O2 field, the electrocatalyst plays an important role in accelerating the sluggish electrochemical reactions, thus improving the performances of Li‐O2 battery. In this field, numerous researches regarding the incorporation of electrocatalyst have been published. With the aim to provide an easy as well as timely access for readers to follow the latest development in the catalyst area, the progress regarding the recent development on the application and research of electrocatalyst for Li‐O2 batteries is reviewed in a comprehensive and systematic manner. The application of various kinds of electrocatalyst including solid catalyst and soluble catalyst is first summarized. Then, relevant research including the catalyst design and the correlation between the catalyst property and the Li‐O2 battery performance is discussed. Finally, insights on how to fabricate an effective electrocatalyst are provided, which are expected to provide guidance for further catalyst design.

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“…Particularly, the electrocatalytic activity and ionic/electronic transport of perovskites could be improved by remarkable structure design, doping or substituting elements. Recently, various perovskite oxides, such as LaNiO 3 , La 0.8 Sr 0.2 Mn 1− x Ni x O 3 , LaNi 1− x Mg x O 3 , La 0.85 FeO 3− δ , La 0.8 Sr 0.2 MnO 3 , La 1.7 Ca 0.3 Ni 0.75 Cu 0.25 O 4 , Sr 2 CrMoO 6− x , etc., were investigated as electrocatalysts in Li−O 2 batteries. Among these candidates, LaMnO 3 is found to show high catalytic activity for ORR .…”

Section: Introductionmentioning

confidence: 99%

Wrinkled Perovskite La_0.9Mn_0.6Ni_0.4O_3−δ Nanofibers as Highly Efficient Electrocatalyst for Rechargeable Li−O₂ Batteries

et al. 2019

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The design of high‐performance electrocatalysts is crucial to the capacity performance and cycle stability of Li−O2 batteries. Herein, wrinkled perovskite La0.9Mn0.6Ni0.4O3−δ nanofibers (LMN NFs) are synthesized by electrospinning method as cathode catalyst for Li−O2 batteries. In comparison with La0.9Mn0.6Ni0.4O3−δ nanoparticles synthesized by traditional sol‐gel method (LMN NPs), the batteries with the LMN NFs catalyst exhibit the larger specific discharge capacity (9397 mAh g−1), better cycle stability (100 cycles) and lower voltage gap (1.111 V) at a current density of 300 mA g−1. The improvement of electrochemical performance is correlated with the structure of wrinkled nanofibers that provides abundant active sites and sufficient provision for Li2O2 deposition. The research provides a highly efficient perovskite‐type electrocatalyst for rechargeable Li−O2 batteries.

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NiCo2O4@La0.8Sr0.2MnO3 core–shell structured nanorods as efficient electrocatalyst for Li O2 battery with enhanced performances

Cited by 43 publications

References 44 publications

Hierarchical NiCo₂S₄@NiO Core–Shell Heterostructures as Catalytic Cathode for Long‐Life Li‐O₂ Batteries

Hierarchical NiCo₂S₄@NiO Core–Shell Heterostructures as Catalytic Cathode for Long‐Life Li‐O₂ Batteries

Recent Progress in Electrocatalyst for Li‐O₂ Batteries

Wrinkled Perovskite La_0.9Mn_0.6Ni_0.4O_3−δ Nanofibers as Highly Efficient Electrocatalyst for Rechargeable Li−O₂ Batteries

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NiCo2O4@La0.8Sr0.2MnO3 core–shell structured nanorods as efficient electrocatalyst for Li O2 battery with enhanced performances

Cited by 43 publications

References 44 publications

Hierarchical NiCo2S4@NiO Core–Shell Heterostructures as Catalytic Cathode for Long‐Life Li‐O2 Batteries

Hierarchical NiCo2S4@NiO Core–Shell Heterostructures as Catalytic Cathode for Long‐Life Li‐O2 Batteries

Recent Progress in Electrocatalyst for Li‐O2 Batteries

Wrinkled Perovskite La0.9Mn0.6Ni0.4O3−δ Nanofibers as Highly Efficient Electrocatalyst for Rechargeable Li−O2 Batteries

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Hierarchical NiCo₂S₄@NiO Core–Shell Heterostructures as Catalytic Cathode for Long‐Life Li‐O₂ Batteries

Hierarchical NiCo₂S₄@NiO Core–Shell Heterostructures as Catalytic Cathode for Long‐Life Li‐O₂ Batteries

Recent Progress in Electrocatalyst for Li‐O₂ Batteries

Wrinkled Perovskite La_0.9Mn_0.6Ni_0.4O_3−δ Nanofibers as Highly Efficient Electrocatalyst for Rechargeable Li−O₂ Batteries