High-performance Li-Se battery cathode based on CoSe 2 -porous carbon composites

Yang, Jun; Gao, Hongcheng; Ma, Dengke; Zou, Jiasui; Lin, Zhongqin; Kang, Xiongwu; Chen, Shaowei

doi:10.1016/j.electacta.2018.01.105

Cited by 61 publications

(40 citation statements)

References 63 publications

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“…The successful synthesis of ZIF‐67 crystals is also confirmed in XRD measurements (Figure S3a, Supporting Information) . Figure S3b (Supporting Information) shows the diffraction peaks of Co@N‐CF/CNTs and Co@CF/CNTs derived from carbonization treatment of ZIF‐67 at different temperatures, where the diffraction peaks for ZIF‐67 crystal vanished completely, and three characteristic peaks for the (111), (200), and (220) lattice facets of metallic cobalt at 2θ = 44.22°, 51.52°, and 75.85° emerged, suggesting the formation of cobalt nanoparticles . These diffraction peaks of Co nanoparticles became increasingly intensified and sharpened with increasing calcination temperature, indicating enhanced crystallinity at elevated temperatures.…”

Section: Resultsmentioning

confidence: 56%

“…The tiny diffraction peak at 2θ = 26.38° was associated with the graphitic carbon, owing to the improved graphitic crystallinity during carbonization. [11b,12] Figure a shows the XRD patterns of CoSe 2 @N‐CF/CNTs and CoSe 2 @CF/CNTs prepared at an optimized temperature at 300 °C for 12 h, which are well indexed to orthorhombic CoSe 2 (PDF No. 53‐0449; Pnnm (58), a = 3.643 Å, b = 4.896 Å, c = 5.821 Å).…”

Section: Resultsmentioning

confidence: 99%

“…The three main peaks at 398.19, 399.02, and 400.74 eV are attributed to pyridinic N, pyrrolic N, graphitic N, respectively,[5d,11b,20a,22] whereas the small pair at the binding energy of 402.11 and 402.75 eV is assigned to oxidized N.[5d,20a,23] The schematic bonding structure of the four types of N dopants is shown in Figure g. The C 1s spectrum is shown in Figure c, and can be deconvoluted into three peaks at 284.6, 285.46, and 287.5 eV, which are attributed to graphitic sp 2 C,[11a,20a,24] Nsp 2 C, and Nsp 3 C species,[5d,11b,25] respectively, further confirming the incorporation of N atoms into the carbon matrix. In contrast, no signal of N 1s (Figure b) was detected in Co@CF/CNTs, possibly due to the escape of nitrogen at higher annealing temperatures.…”

Section: Resultsmentioning

confidence: 99%

“…In contrast, no signal of N 1s (Figure b) was detected in Co@CF/CNTs, possibly due to the escape of nitrogen at higher annealing temperatures. [11b] The peak at 285.57 eV for Co@CF/CNTs (Figure S6a, Supporting Information) was ascribed to the formation of CO bond during the annealing process. [23a,24b,26]…”

Section: Resultsmentioning

confidence: 99%

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CoSe₂ Nanoparticles Encapsulated by N‐Doped Carbon Framework Intertwined with Carbon Nanotubes: High‐Performance Dual‐Role Anode Materials for Both Li‐ and Na‐Ion Batteries

et al. 2018

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It is of fundamental and technological significance to develop dual‐role anode materials for both lithium‐ion batteries (LIBs) and sodium‐ion batteries (SIBs) with high performance. Here, a composite material based on CoSe2 nanoparticles encapsulated in N‐doped carbon framework intertwined with carbon nanotubes (CoSe2@N‐CF/CNTs) is prepared successfully from cobalt‐based zeolitic imidazolate framework (ZIF‐67). As anode materials for LIBs, CoSe2@N‐CF/CNTs composites deliver a reversible capacity of 428 mAh g−1 even after 500 cycles at a current density of 1 A g−1 with almost 100% Coulombic efficiency. The charge and discharge mechanisms of CoSe2 are characterized using ex situ X‐ray diffraction and Raman analysis, from which the lithiation products of CoSe2 are found to be LixCoSe2 and Li2Se, which are further converted to CoSe2 upon delithiation. The CoSe2@N‐CF/CNTs composites also demonstrate excellent electrochemical performance as anode materials for SIBs with a carbonate‐based electrolyte, with specific capacities of 606 and 501 mAh g−1 at 0.1 and 1 A g−1 in the 100th cycle. The electrochemical performance of the anode materials is further studied by pseudocapacitance and galvanostatic intermittent titration technique (GITT) measurements. This work may be exploited for the rational design and development of dual‐role anode materials for both Li‐ and Na‐ion batteries.

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Section: Resultsmentioning

confidence: 56%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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CoSe₂ Nanoparticles Encapsulated by N‐Doped Carbon Framework Intertwined with Carbon Nanotubes: High‐Performance Dual‐Role Anode Materials for Both Li‐ and Na‐Ion Batteries

et al. 2018

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“…[ 8 ] The porous carbon matrix not only has physical adsorption to polyselenide, but also provides suitable porosity and large specific surface area to buffer volume change. [ 9,10 ] So far, numerous carbon materials have been applied to achieve impressive electrochemical performance, including porous carbon, [ 11–13 ] carbon spheres, [ 14,15 ] graphene, [ 16–18 ] carbon nanotube/nanocage, [ 19,20 ] and so on.…”

Section: Introductionmentioning

confidence: 99%

Porous Bamboo‐Derived Carbon as Selenium Host for Advanced Lithium/Sodium–Selenium Batteries

Wang

Zhao

et al. 2020

Energy Tech

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Selenium (Se) has received extensive attention as the most competitive cathode material for next generation high‐energy batteries. However, the shuttle effect of polyselenide and volume change lead to inferior electrochemical properties. To solve these issues, a porous bamboo‐derived carbon (PBC) with abundant meso/micropores is prepared as a framework to effectively encapsulate elemental selenium. For Li–Se batteries, Se/PBC electrode delivers an outstanding capacity of 509 mAh g−1 after 200 cycles at 0.2 C (1 C = 675 mA g−1) with a low capacity fade of 0.036% per cycle. The Se/PBC composite also reveals a satisfied electrochemical performance for Na–Se batteries with an excellent capacity of 409 mAh g−1 after 200 cycles at 0.2 C. Moreover, Se/PBC electrode also presents excellent long‐term cycle performance and rate performance at 15 C for Li–Se batteries and 10 C for Na–Se batteries. The outstanding properties are attributed to the specific 3D structure and high conductivity of PBC, which significantly inhibits the shuttle effect and enhances the reaction kinetics. Herein, not only the great application potential of bamboo in energy storage systems is demonstrated, but also an effective approach and low‐cost strategy for improving the performance of lithium/sodium–selenium batteries is offered.

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State‐Of‐The‐Art and Future Challenges in High Energy Lithium–Selenium Batteries

Sun

Liu

et al. 2021

Advanced Materials

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Li‐chalcogen batteries, especially the Li–S batteries (LSBs), have received paramount interests as next generation energy storage techniques because of their high theoretical energy densities. However, the associated challenges need to be overcome prior to their commercialization. Elemental selenium, another chalcogen member, would be an attractive alternative to sulfur owing to its higher electronic conductivity, comparable capacity density, and moreover, excellent compatibility with carbonate electrolytes. Unlike LSBs, the research and development of Li–Se batteries (LSeBs) have garnered burgeoning attention but are still in their infant stage, where a comprehensive yet in‐depth overview is highly imperative to guide future research. Herein, a critical review of LSeBs, in terms of the underlying mechanisms, cathode design, blocking layer engineering, and emerging solid‐state electrolytes is provided. First, the electrolyte‐dependent electrochemistry of LSeBs is discussed. Second, the advances in Se‐based cathodes are comprehensively summarized, especially highlighting the state‐of‐the‐art SexSy cathodes, and mainly focusing on their structures, compositions, and synthetic strategies. Third, the versatile separators/interlayers optimization and interface regulation are outlined, with a particular focus on the emerging solid‐state electrolytes for advanced LSeBs. Last, the remaining challenges and research orientations in this booming field are proposed, which are expected to motivate more insightful works.

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High-performance Li-Se battery cathode based on CoSe 2 -porous carbon composites

Cited by 61 publications

References 63 publications

CoSe₂ Nanoparticles Encapsulated by N‐Doped Carbon Framework Intertwined with Carbon Nanotubes: High‐Performance Dual‐Role Anode Materials for Both Li‐ and Na‐Ion Batteries

CoSe₂ Nanoparticles Encapsulated by N‐Doped Carbon Framework Intertwined with Carbon Nanotubes: High‐Performance Dual‐Role Anode Materials for Both Li‐ and Na‐Ion Batteries

Porous Bamboo‐Derived Carbon as Selenium Host for Advanced Lithium/Sodium–Selenium Batteries

State‐Of‐The‐Art and Future Challenges in High Energy Lithium–Selenium Batteries

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High-performance Li-Se battery cathode based on CoSe 2 -porous carbon composites

Cited by 61 publications

References 63 publications

CoSe2 Nanoparticles Encapsulated by N‐Doped Carbon Framework Intertwined with Carbon Nanotubes: High‐Performance Dual‐Role Anode Materials for Both Li‐ and Na‐Ion Batteries

CoSe2 Nanoparticles Encapsulated by N‐Doped Carbon Framework Intertwined with Carbon Nanotubes: High‐Performance Dual‐Role Anode Materials for Both Li‐ and Na‐Ion Batteries

Porous Bamboo‐Derived Carbon as Selenium Host for Advanced Lithium/Sodium–Selenium Batteries

State‐Of‐The‐Art and Future Challenges in High Energy Lithium–Selenium Batteries

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Product

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CoSe₂ Nanoparticles Encapsulated by N‐Doped Carbon Framework Intertwined with Carbon Nanotubes: High‐Performance Dual‐Role Anode Materials for Both Li‐ and Na‐Ion Batteries

CoSe₂ Nanoparticles Encapsulated by N‐Doped Carbon Framework Intertwined with Carbon Nanotubes: High‐Performance Dual‐Role Anode Materials for Both Li‐ and Na‐Ion Batteries