Nickel–Cobalt Double Hydroxide as a Multifunctional Mediator for Ultrahigh‐Rate and Ultralong‐Life Li–S Batteries

Zhang, Long; Chen, Zhongxin; Dongfang, Nanchen; Li, Mengxiong; Diao, Caozheng; Wu, Qing-Song; Chi, Xiao; Jiang, Peilu; Zhao, Zedong; Dong, Lei; Che, Renchao; Loh, Kian Ping; Lu, Hongbin

doi:10.1002/aenm.201802431

Cited by 82 publications

(59 citation statements)

References 65 publications

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“…Good electrical contact with sufficient conductive additives might be necessary to facilitate a smooth conversion of sulfur . A further improved redox kinetics of sulfur cathode could be realized by applying various electrocatalysts (e.g., metals,107a,b,108 metallic compounds,107c–e,109 and polar materials108,109b) in the sulfur cathode as redox mediators. These mediators possess high catalytic activity, which enable sulfur to exhibit enhanced conversion efficiency and stability .…”

Section: Lithium–sulfur Cellsmentioning

confidence: 99%

See 1 more Smart Citation

Current Status and Future Prospects of Metal–Sulfur Batteries

Chung¹,

Manthiram²

2019

Advanced Materials

448

404

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that makes use of intercalation materials as the electrodes (Figure 1), applications involving electric vehicles and smart grids may require rechargeable batteries with new battery chemistries that can generate even higher energy densities for longer driving ranges and higher energy-storage capabilities. [6][7][8] Additionally, the lithiated transition-metal oxides used in commercial lithium-ion battery cathodes tend to be expensive, scarce, or toxic to the environment. Thus, it is desirable to explore new electrode materials that are naturally abundant (and therefore less expensive) as well as environmentally compatible in order to successfully enter the future battery markets. [6,[8][9][10][11] This driving force has promoted the development of batteries with conversionreaction electrodes, in which reversible electrochemical reactions take place and new chemical compounds form during the cycling of the battery. Naturally abundant materials, such as sulfur for the cathode, can be applied as electrodes. Different metallic anodes have shown great potential in coupling with sulfur cathode to generate a high energy density, including lithium metal [3,10,[12][13][14][15][16][17]31] as well as other alkali [18][19][20][21][22][23][24]31] and high-valent metals. [18,[25][26][27][28][29][30][31] As a next-generation energy-storage technology beyond lithium-ion batteries, lithium-sulfur batteries are the most promising low-cost, high-capacity energy-storage device available due to their high charge-storage capacity, low cost, and the wide availability of sulfur. [32][33][34][35] The electrochemical reactions of lithium-sulfur batteries involve reversible conversions between sulfur (S 8 ), lithium polysulfides (Li 2 S x , x = 4-8), and lithium sulfides (Li 2 S 2 and Li 2 S). [33][34][35][36] The conversions between sulfur and lithium polysulfides and lithium sulfides involve phase changes between liquid-state polysulfides and solid-state sulfur and sulfides. [35][36][37][38][39][40] Thus, the conversion reaction of lithium-sulfur battery chemistry has no restriction in maintaining the initial crystal chemistry of the electrode during electrochemical cycling. [39][40][41][42] Therefore, a full twoelectron redox reaction per sulfur atom can occur in a manner that is both reversible and stable, increasing the chargestorage capacity drastically as compared to the currently used insertion-reaction oxide cathodes. [7,[39][40][41][42] As a result, sulfur cathodes possess a high theoretical charge-storage capacity of 1672 mA h g −1 , which is the highest value among solid-state Lithium-sulfur batteries are a major focus of academic and industrial energystorage research due to their high theoretical energy density and the use of low-cost materials. The high energy density results from the conversion mechanism that lithium-sulfur cells utilize. The sulfur cathode, being naturally abundant and environmentally friendly, makes lithium-sulfur batteries a potential next-generation energy-storage technology. The current state of the rese...

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Section: Lithium–sulfur Cellsmentioning

confidence: 99%

“…In consideration of the insulating nature of sulfur, a high content and mass loading of a conductive matrix and additional auxiliary electrocatalysts may be needed. However, a low sulfur content resulted would cause the cell to have a low effective capacity and energy density …”

Section: Lithium–sulfur Cellsmentioning

confidence: 99%

Current Status and Future Prospects of Metal–Sulfur Batteries

Chung¹,

Manthiram²

2019

Advanced Materials

448

404

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“…Powering the rapid LiPS conversion is critically important to realize high‐capacity, fast‐charge, and long‐term Li–S batteries. Based on these considerations, various electrocatalysts are applied in a working Li–S battery . However, most of them suffer from low surface‐to‐volume ratio, considerably sacrificing the electrocatalytic activities.…”

Section: Introductionmentioning

confidence: 99%

“…Based on these considerations, various electrocatalysts are applied in a working Li-S battery. [78][79][80][81][82][83][84] However, most of them suffer from low surface-to-volume ratio, considerably sacrificing the electrocatalytic activities. Atomic-scale electrocatalysts are preferred in this respect, as they take advantages of atomic efficiency of electrocatalysts to modulate the LiPS electrochemical behaviors.…”

Section: Introductionmentioning

confidence: 99%

Expediting redox kinetics of sulfur species by atomic‐scale electrocatalysts in lithium–sulfur batteries

Kong

Chang-xin

et al. 2019

InfoMat

269

169

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Lithium–sulfur (Li–S) batteries have extremely high theoretical energy density that make them as promising systems toward vast practical applications. Expediting redox kinetics of sulfur species is a decisive task to break the kinetic limitation of insulating lithium sulfide/disulfide precipitation/dissolution. Herein, we proposed a porphyrin‐derived atomic electrocatalyst to exert atomic‐efficient electrocatalytic effects on polysulfide intermediates. Quantifying electrocatalytic efficiency of liquid/solid conversion through a potentiostatic intermittent titration technique measurement presents a kinetic understanding of specific phase evolutions imparted by the atomic electrocatalyst. Benefiting from atomically dispersed “lithiophilic” and “sulfiphilic” sites on conductive substrates, the finely designed atomic electrocatalyst endows Li–S cells with remarkable cycling stablity (cyclic decay rate of 0.10% in 300 cycles), excellent rate capability (1035 mAh g−1 at 2 C), and impressive areal capacity (10.9 mAh cm−2 at a sulfur loading of 11.3 mg cm−2). The present work expands atomic electrocatalysts to the Li–S chemistry, deepens kinetic understanding of sulfur species evolution, and encourages application of emerging electrocatalysis in other multielectron/multiphase reaction energy systems.

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“…2.25 g cm −3 for graphite) . Accordingly, lithium‐metal batteries with ultrahigh energy densities, including Li‐sulfur and Li‐air cells, have become a popular research topic. Analogously to graphite, meanwhile with different features and magnitude, the lithium metal anode is thermodynamically unstable in most electrolyte solutions, thereby requiring an adequate solid electrolyte interphase (SEI) layer to kinetically prevent parasitic reactions, which affect anode, electrolyte and cycling performance, and possibly limit hazardous dendritic growth .…”

Section: Introductionmentioning

confidence: 99%

Towards a High‐Performance Lithium‐Metal Battery with Glyme Solution and an Olivine Cathode

et al. 2020

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High‐performance lithium‐metal batteries are achieved by using a glyme‐based electrolyte enhanced with a LiNO3 additive and a LiFePO4 cathode. An optimal electrolyte formulation is selected upon detailed analysis of the electrochemical properties of various solutions formed by dissolving respectively lithium bis(fluorosulfonyl)imide (LiFSI), lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), and lithium bis(pentafluoroethanesulfonyl)imide (LiBETI) either in diethylene glycol dimethyl ether or in triethylene glycol dimethyl ether and by adding LiNO3. A thorough investigation shows evidence of efficient ionic transport, a wide stability window, low reactivity with lithium metal, and cathode/electrolyte interphase characteristics that are strongly dependent on the glyme chain length. The best Li/LiFePO4 battery delivers 154 mAh g−1 at C/3 (1 C=170 mA g−1) without any decay after 200 cycles. Tests at 1 C and 5 C show initial capacities of about 150 and 140 mAh g−1, a retention exceeding 70 % after 500 cycles, and suitable electrode/electrolyte interphases evolution.

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Nickel–Cobalt Double Hydroxide as a Multifunctional Mediator for Ultrahigh‐Rate and Ultralong‐Life Li–S Batteries

Cited by 82 publications

References 65 publications

Current Status and Future Prospects of Metal–Sulfur Batteries

Current Status and Future Prospects of Metal–Sulfur Batteries

Expediting redox kinetics of sulfur species by atomic‐scale electrocatalysts in lithium–sulfur batteries

Towards a High‐Performance Lithium‐Metal Battery with Glyme Solution and an Olivine Cathode

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