Se-doped carbon as highly stable cathode material for high energy nonaqueous Li-O2 batteries

Qian, Zhengyi; Guo, Rui; Ma, Yulin; Li, Changjin; Du, Lei; Wang, Yang; Du, Chunyu; Huo, Hua; Yin, Geping

doi:10.1016/j.ces.2019.115413

Cited by 21 publications

(13 citation statements)

References 32 publications

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“…As mentioned above, heteroatom‐doped carbon hosts have been universally adopted in LSBs to improve the wettability of hosts and enhance affinities toward LiPSs. [ 5,24 ] Intense interactions between introduced heteroatoms and carbon hosts were demonstrated by the CN (285.4 eV), [ 24 ] CSe (285.4 eV), [ 45,46 ] CO (286.3 eV) [ 47 ] bonds in C 1s core levels. Specifically, four individual binding peaks at 398.1, 400.1, 400.8, and 403.9 eV by the deconvoluted XPS N 1s spectrum can be assigned to pyridinic‐, pyrrolic‐, graphitic‐, and oxidic‐N, respectively, endowing the N‐CN‐750@Co 3 Se 4 ‐0.1 m with abundant Lewis polar sites for chemisorption of LiPSs.…”

Section: Resultsmentioning

confidence: 99%

Ultrafine Co₃Se₄ Nanoparticles in Nitrogen‐Doped 3D Carbon Matrix for High‐Stable and Long‐Cycle‐Life Lithium Sulfur Batteries

Cai

Liu

Zhu

et al. 2020

Advanced Energy Materials

165

108

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Lithium-sulfur batteries are a promising high energy output solution for substitution of traditional lithium ion batteries. In recent times research in this field has stepped into the exploration of practical applications. However, their applications are impeded by cycling stability and short life-span mainly due to the notorious polysulfide shuttle effect. In this work, a multifunctional sulfur host fabricated by grafting highly conductive Co 3 Se 4 nanoparticles onto the surface of an N-doped 3D carbon matrix to inhibit the polysulfide shuttle and improve the sulfur utilization is proposed. By regulating the carbon matrix and the Co 3 Se 4 distribution, N-CN-750@Co 3 Se 4 -0.1 m with abundant polar sites is experimentally and theoretically shown to be a good LiPSs absorbent and a sulfur conversion accelerator. The S/N-CN-750@ Co 3 Se 4 -0.1 m cathode shows excellent sulfur utilization, rate performance, and cyclic durability. A prolonged cycling test of the as-fabricated S/N-CN-750@Co 3 Se 4 -0.1 m cathode is carried out at 0.2 C for more than 5 months which delivers a high initial capacity of 1150.3 mAh g −1 and retains 531.0 mAh g −1 after 800 cycles with an ultralow capacity reduction of 0.067% per cycle, maintaining Coulombic efficiency of more than 99.3%. The reaction details are characterized and analyzed by ex situ measurements. This work highly emphasizes the potential capabilities of transition-metal selenides in lithium-sulfur batteries.

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Section: Resultsmentioning

confidence: 99%

Ultrafine Co₃Se₄ Nanoparticles in Nitrogen‐Doped 3D Carbon Matrix for High‐Stable and Long‐Cycle‐Life Lithium Sulfur Batteries

Cai

Liu

Zhu

et al. 2020

Advanced Energy Materials

165

108

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“…The adsorption energy between LiO 2 and IrNi alloy is calculated to be about −2.48 eV, lower than the free dissolving energy of LiO 2 in DMSO (−1.30 eV) and the adsorption energy between LiO 2 and carbon basal plane (11.907 eV). 54,55 The strong adsorption of LiO 2 on the holey IrNi alloy substrate is likely to suppress or slow LiO 2 disproportionation reactions, thus favoring the formation of superoxide-like Li 2−x O 2 species. Also, IrNi 4 cluster exhibits stronger adsorption (BE = −2.51 eV) toward O 2 * than Ir 4 (BE = −1.21 eV), the stronger adsorption of O 2 * further leads to relatively weak binding with Li atoms (i.e.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Enabling Highly Stable Li–O₂ Batteries with Full Discharge–Charge Capability: The Porous Binder- and Carbon-Free IrNi Nanosheet Cathode

Qian

Wang

et al. 2020

ACS Sustainable Chem. Eng.

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Rechargeable aprotic Li−O 2 batteries have drawn much attention in light of their ultrahigh theoretical energy density. However, the sluggish kinetics of oxygen cathode reactions lead to huge energy loss, while the unfavorable side reactions associated with the widely used carbon and binder account for fast battery decay during cycles. Herein, hierarchically holey IrNi alloy nanosheets are facilely designed on Ni foam substrate as a freestanding, binder-and carbon-free cathode to address these challenges. The IrNi nanosheets consist of numerous interconnected nanoparticles, forming abundant nanoholes, benefiting active-site exposure. Moreover, the meso-/macropores pave channels for the transfer of oxygen and lithium ions and provide enough accommodation for the insoluble Li 2 O 2 product. The corresponding Li−O 2 batteries demonstrate low polarization and excellent cycle stability with full discharge/charge capability (up to 292 cycles at a current density of 0.2 mA cm −2 within a voltage range from 2.3 to 4.3 V). The long-term cycling performance is principally attributed to the exclusive catalytic stability of the holey IrNi nanosheets and its good compatibility with dimethyl sulfoxide-based electrolyte. Our research provides novel insights into the design of robust and freestanding porous cathodes for high energy density Li−O 2 batteries.

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“…The scheme of the LiO 2 adsorption on Se‐doped carbon is depicted in Figure 6E. As shown in the discharge curve, the discharge capacity of Se‐doped carbon was dramatically enhanced facilitating the kinetics of oxygen involving reaction 117 . Such improvement in the reaction kinetic is closely related to the size of the Se atom.…”

Section: Nanostructured Carbonaceous Materials For Metal Anodementioning

confidence: 96%

“…(E) The optimized geometries of LiO 2 binding on BP‐2000 and Se‐BP‐2000 with discharge curve. Reproduced with permission, Copyright 2020, Elsevier 117 . (F) Schematic illustration for the synthesis of INPG and specific capacity 118 .…”

Section: Nanostructured Carbonaceous Materials For Metal Anodementioning

confidence: 99%

Chemical modification of ordered/disordered carbon nanostructures for metal hosts and electrocatalysts of lithium‐air batteries

Lee

Jang

et al. 2021

InfoMat

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Although lithium‐air batteries (LABs) are considered the promising alternative of existing lithium–ion batteries owing to their high energy density of 11 680 W h kg−1, their practical applications are limited by the technical issues, such as unstable solid electrolyte interface and dendrite formation from metal anode and insufficient bifunctional activities and durability from cathode catalyst. In order to resolve these bottlenecks, carbon nanostructures have been investigated owing to their high surface area, excellent electrical conductivity, electrochemical stability, and various modification chemistries. Herein, we comprehensively review a recent progress on the design of carbon nanostructures for their applications into metal hosts, protection layers, and bifunctional electrocatalysts of LABs. The correlation between the crystalline, electronic, porous, and chemical structures and the electrochemical properties of carbon nanomaterials are discussed depending on their classification and characteristics. Various chemical modifications, such as morphological control, hierarchical architecturing, heteroatom incorporation, and the formation of composites, for the improved electrochemical performances of anode and cathode will be also addressed. Furthermore, we deal with the perspectives for the ongoing obstruction and future guidance.

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Se-doped carbon as highly stable cathode material for high energy nonaqueous Li-O2 batteries

Cited by 21 publications

References 32 publications

Ultrafine Co₃Se₄ Nanoparticles in Nitrogen‐Doped 3D Carbon Matrix for High‐Stable and Long‐Cycle‐Life Lithium Sulfur Batteries

Ultrafine Co₃Se₄ Nanoparticles in Nitrogen‐Doped 3D Carbon Matrix for High‐Stable and Long‐Cycle‐Life Lithium Sulfur Batteries

Enabling Highly Stable Li–O₂ Batteries with Full Discharge–Charge Capability: The Porous Binder- and Carbon-Free IrNi Nanosheet Cathode

Chemical modification of ordered/disordered carbon nanostructures for metal hosts and electrocatalysts of lithium‐air batteries

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Se-doped carbon as highly stable cathode material for high energy nonaqueous Li-O2 batteries

Cited by 21 publications

References 32 publications

Ultrafine Co3Se4 Nanoparticles in Nitrogen‐Doped 3D Carbon Matrix for High‐Stable and Long‐Cycle‐Life Lithium Sulfur Batteries

Ultrafine Co3Se4 Nanoparticles in Nitrogen‐Doped 3D Carbon Matrix for High‐Stable and Long‐Cycle‐Life Lithium Sulfur Batteries

Enabling Highly Stable Li–O2 Batteries with Full Discharge–Charge Capability: The Porous Binder- and Carbon-Free IrNi Nanosheet Cathode

Chemical modification of ordered/disordered carbon nanostructures for metal hosts and electrocatalysts of lithium‐air batteries

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Ultrafine Co₃Se₄ Nanoparticles in Nitrogen‐Doped 3D Carbon Matrix for High‐Stable and Long‐Cycle‐Life Lithium Sulfur Batteries

Ultrafine Co₃Se₄ Nanoparticles in Nitrogen‐Doped 3D Carbon Matrix for High‐Stable and Long‐Cycle‐Life Lithium Sulfur Batteries

Enabling Highly Stable Li–O₂ Batteries with Full Discharge–Charge Capability: The Porous Binder- and Carbon-Free IrNi Nanosheet Cathode