Potassium‐Ion Batteries: Understanding of the Ultrastable K‐Ion Storage of Carbonaceous Anode (Adv. Funct. Mater. 29/2018)

Liu, Lei; Chen, Yu; Xie, Yihao; Peng, Tao; Li, Qinyi; Yan, Chenglin

doi:10.1002/adfm.201870204

Cited by 52 publications

(40 citation statements)

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“…To further clarify the electrochemical kinetics of the NC@CoP/NC electrode, the pseudocapacitive contribution was probed by carrying out CV scans at sweep rates ranging from 0.1 to 1.2 mV s −1 (Figure S14, Supporting Information). According to the equation i = av b ( i is the current, v is the scan rate, a and b are constants), the b value obtained from peaks of anodic and cathodic current are 0.73 and 0.71, respectively (Figure S15, Supporting Information), indicative of combined pseudocapacitive and diffusion‐controlled processes . The outstanding rate capability and cycling stability of the NC@CoP/NC in terms of potassium‐ion storage (Table S1, Supporting Information) could be ascribed to the rational design of MOF‐derived nanostructure, affording synergistic advantages from the nitrogen‐doped carbon confined CoP polyhedrons.…”

Section: Resultsmentioning

confidence: 99%

ZIF‐8@ZIF‐67‐Derived Nitrogen‐Doped Porous Carbon Confined CoP Polyhedron Targeting Superior Potassium‐Ion Storage

Zhao

Zeng

et al. 2020

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158

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Potassium ion batteries (KIB) have become a compelling energy‐storage system owing to their cost effectiveness and the high abundance of potassium in comparison with lithium. However, its practical applications have been thwarted by a series of challenges, including marked volume expansion and sluggish reaction kinetics caused by the large radius of potassium ions. In line with this, the exploration of reliable anode materials affording high electrical conductivity, sufficient active sites, and structural robustness is the key. The synthesis of ZIF‐8@ZIF‐67 derived nitrogen‐doped porous carbon confined CoP polyhedron architectures (NC@CoP/NC) to function as innovative KIB anode materials is reported. Such composites enable an outstanding rate performance to harvest a capacity of ≈200 mAh g−1 at 2000 mA g−1. Additionally, a high cycling stability can be gained by maintaining a high capacity retention of 93% after 100 cycles at 100 mA g−1. Furthermore, the potassium ion storage mechanism of the NC@CoP/NC anode is systematically probed through theoretical simulations and experimental characterization. This contribution may offer an innovative and feasible route of emerging anode design toward high performance KIBs.

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Section: Resultsmentioning

confidence: 99%

ZIF‐8@ZIF‐67‐Derived Nitrogen‐Doped Porous Carbon Confined CoP Polyhedron Targeting Superior Potassium‐Ion Storage

Zhao

Zeng

et al. 2020

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158

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“…By comparison, the adsorption of K + onto the surface defects/functional groups or nanovoids of carbon is a surface‐induced capacitive process, which can favor fast ion diffusion and sustain excellent structure stability, promoting high rate and long cycling performance. [ 111 ] The capacitive contribution may originate from the double‐layer capacitance/pseudocapacitance behavior mainly occurring on the active surface, which can be enhanced by the increment of SSA and doping of heteroatoms, [ 116 ] without any damage to the electrode. For example, N/O doped macro/meso/microporous hard carbon microspheres (SSA = 1030 m 2 g −1 ) exhibited a capacitance‐dominant K‐ion storage.…”

Section: Structural Design Of Nanoporous Carbons For Versatile Applicmentioning

confidence: 99%

“…[ 117 ] Envelope‐like N‐doped carbon nanosheets (SSA = 674 m 2 g −1 ) with a pore size centering at 13.8 nm was evidenced to present high pseudocapacitance as KIB anode, delivering an initial reversible capacity of 367 mAh g −1 at 50 mA g −1 with ultrastable cyclic performance. [ 116 ]…”

Section: Structural Design Of Nanoporous Carbons For Versatile Applicmentioning

confidence: 99%

Porous Carbons: Structure‐Oriented Design and Versatile Applications

Tian

Zhang

Duan

et al. 2020

Adv Funct Materials

424

141

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Porous carbon materials have demonstrated exceptional performance in a variety of energy-and environment-related applications. Over the past decades, tremendous efforts have been made in the coordinated design and fabrication of porous carbon nanoarchitectures in terms of pore sizes, surface chemistry, and structure. Herein, structure-oriented carbon design and applications are reviewed. The unique properties of porous carbon materials that offer them promising design opportunities and broad applicability in some representative fields, including water remediation, CO 2 capture, lithium-ion batteries, lithium-sulfur batteries, lithium metal anodes, Na-ion batteries, K-ion batteries, supercapacitors, and the oxygen reduction reaction are highlighted. Then, the most up-to-date strategies for structural control and functionalization of porous carbons are summarized, toward tailoring microporous, mesoporous, macroporous, and hierarchically porous carbons with disordered or ordered, amorphous or graphitic structures. Meanwhile, the emerging features of these structures in various applications are introduced where applicable. Finally, insights into the challenges and perspectives for future development are provided.

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“…To date, a variety of potential electrode materials, including carbon materials (graphite, porous carbon, graphene, and carbon nanotubes) and metal‐based compounds, have been explored for PIB anodes . However, the reversible capacity and the cycling stability of most materials are still unsatisfactory to meet the requirements of high energy density storage devices . Particularly, the intrinsic larger ionic radius of K + (1.38 Å), in comparison to Li + (0.76 Å), causes the high mechanical stress/strain of host electrodes and the sluggish diffusion rate during K‐ion intercalation/de‐intercalation …”

Section: Introductionmentioning

confidence: 99%

Controlled Design of Well‐Dispersed Ultrathin MoS₂ Nanosheets inside Hollow Carbon Skeleton: Toward Fast Potassium Storage by Constructing Spacious “Houses” for K Ions

Cui

Liu

Feng

et al. 2020

Adv Funct Materials

159

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The large volume expansion induced by K+ intercalation is always a big challenge for designing high‐performance electrode materials in potassium‐ion storage system. Based on the idea that large‐sized ions should accommodate big “houses,” a facile‐induced growth strategy is proposed to achieve the self‐loading of MoS2 clusters inside a hollow tubular carbon skeleton (HTCS). Meantime, a step‐by‐step intercalation technology is employed to tune the interlayer distance and the layer number of MoS2. Based on the above, the ED‐MoS2@CT hybrids are achieved by self‐loading and anchoring the well‐dispersed ultrathin MoS2 nanosheets on the inner surface of HTCSs. This unique compositing model not only alleviates the mechanical strain efficiently, but also provides spacious “roads” (hollow tubular carbon skeleton) and “houses” (interlayer expanded ultrathin MoS2 sheets) for fast K+ transition and storage. As an anode of potassium‐ion batteries, the resultant ED‐MoS2@CT electrode delivers a high specific capacity of 148.5 mAh g−1 at 2 A g−1 after 10 000 cycles with only 0.002% fading per cycle. The assembled ED‐MoS2@CT//PC potassium‐ion hybrid supercapacitor device shows a high energy density of 148 Wh kg−1 at a power density of 965 W kg−1, which is comparable to that of lithium‐ion hybrid supercapacitors.

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Potassium‐Ion Batteries: Understanding of the Ultrastable K‐Ion Storage of Carbonaceous Anode (Adv. Funct. Mater. 29/2018)

Cited by 52 publications

References 0 publications

ZIF‐8@ZIF‐67‐Derived Nitrogen‐Doped Porous Carbon Confined CoP Polyhedron Targeting Superior Potassium‐Ion Storage

ZIF‐8@ZIF‐67‐Derived Nitrogen‐Doped Porous Carbon Confined CoP Polyhedron Targeting Superior Potassium‐Ion Storage

Porous Carbons: Structure‐Oriented Design and Versatile Applications

Controlled Design of Well‐Dispersed Ultrathin MoS₂ Nanosheets inside Hollow Carbon Skeleton: Toward Fast Potassium Storage by Constructing Spacious “Houses” for K Ions

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Potassium‐Ion Batteries: Understanding of the Ultrastable K‐Ion Storage of Carbonaceous Anode (Adv. Funct. Mater. 29/2018)

Cited by 52 publications

References 0 publications

ZIF‐8@ZIF‐67‐Derived Nitrogen‐Doped Porous Carbon Confined CoP Polyhedron Targeting Superior Potassium‐Ion Storage

ZIF‐8@ZIF‐67‐Derived Nitrogen‐Doped Porous Carbon Confined CoP Polyhedron Targeting Superior Potassium‐Ion Storage

Porous Carbons: Structure‐Oriented Design and Versatile Applications

Controlled Design of Well‐Dispersed Ultrathin MoS2 Nanosheets inside Hollow Carbon Skeleton: Toward Fast Potassium Storage by Constructing Spacious “Houses” for K Ions

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Product

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Controlled Design of Well‐Dispersed Ultrathin MoS₂ Nanosheets inside Hollow Carbon Skeleton: Toward Fast Potassium Storage by Constructing Spacious “Houses” for K Ions