Anode-free sodium metal batteries hold significant promise for high-energy-density storage but face critical challenges related to sodium deposition dynamics and interfacial instability.Traditional approaches,such as ...Anode-free sodium metal batteries hold significant promise for high-energy-density storage but face critical challenges related to sodium deposition dynamics and interfacial instability.Traditional approaches,such as alloy-based current collectors or fluorinated interfaces,often suffer from irreversible volume expansion or corrosive fabrication processes.This study introduces a solvent co-intercalation-mediated in situ sodiophilic interface engineering strategy to overcome these limitations.A graphitized carbon-modified aluminum current collector dynamically regulates interfacial evolution through solvated sodium-ion co-intercalation during initial cycling,prompting the formation of a C-NaF interface with ultralow Na^(+)adsorption energy.This sodiophilic interface not only facilitates uniform sodium nucleation by providing abundant sodium-philic sites but also encourages the preferential decomposition of anions in the electrolyte,leading to the creation of a robust and NaF-rich solid electrolyte interphase.Consequently,the asymmetric half-cell delivers an ultralow nucleation overpotential(9.7 mV at 0.5 mA cm^(-2))and maintains an average coulombic efficiency of 99.8%over 400 cycles at 1 mA cm^(-2).When combined with a Na_(3)V_(2)(PO_(4))_(2)O_(2)F(NVPOF)cathode,the full cell achieves an energy density of 363 Wh kg^(-1) with 80%capacity retention after 250 cycles at 0.5 C.This work integrates molecular-level dynamic interfacial engineering with macroscopic electrochemical stability,providing a scalable industrial solution for next-generation battery systems.展开更多
Plasma photonic crystals(PPCs)are emerging as a powerful instrument for the dynamical control of the electromagnetic properties of a propagating wave.Here we demonstrate several one-dimensional(1 D)PPCs with uniquely ...Plasma photonic crystals(PPCs)are emerging as a powerful instrument for the dynamical control of the electromagnetic properties of a propagating wave.Here we demonstrate several one-dimensional(1 D)PPCs with uniquely designed superlattice structures,annular structures or with incorporation of the third material into the primitive unit cell.The influences of the properties of the third material as well as the structural configurations of suplerlattices on the transmittance characteristics of PPCs have been investigated by use of the finite element method.The optimal design strategy for producing PPCs that have more and larger band gaps is provided.These new schemes can potentially be extended to 2 D or 3 D plasma crystals,which may find broad applications in the manipulation of microwaves and terahertz waves.展开更多
MoSe_(2) has been recognized as a promising anode material for lithium/sodium ion batteries due to its unique structure and material properties.Here,hierarchical MoSe_(2)@C hollow nanospheres(MoSe_(2)@C HNSs)assembled...MoSe_(2) has been recognized as a promising anode material for lithium/sodium ion batteries due to its unique structure and material properties.Here,hierarchical MoSe_(2)@C hollow nanospheres(MoSe_(2)@C HNSs)assembled with ultrathin nanosheets are prepared via a facile solvothermal method.The MoSe_(2)@C HNS composite is fabricated by an anion-exchange reaction from Mo-glycerate solid spheres combining with the carbonization of glucose.When used as an anode material for LIBs,the MoSe_(2)@C HNS composite manifests a reversible capacity of 711 mA h g^(−1) after 300 cycles under a current density of 500 mA g^(−1).When evaluated as an anode material for SIBs,the MoSe_(2)@C HNS composite delivers a high capacity of 683 mA h g^(−1) at 100 mA g^(−1) and maintains a capacity of 458 mA h g^(−1) after 200 cycles at 200 mA g^(−1).The efficient lithium and sodium ion storage performance should be ascribed to the unique hierarchical hollow nanostructure and synchronously incorporated carbon material.展开更多
Zinc(Zn)has been regarded as the most promising anodematerial for aqueous rechargeable batteries because of itshigh theoretical capacity(820 mA h g^(-1)),moderate elec-trochemical potential(-0.762 V vs.the standard hy...Zinc(Zn)has been regarded as the most promising anodematerial for aqueous rechargeable batteries because of itshigh theoretical capacity(820 mA h g^(-1)),moderate elec-trochemical potential(-0.762 V vs.the standard hydro-gen electrode(SHE)),low cost and environmentalfriendliness[1-3].展开更多
基金supported by the Natural Science Foundation Project of CQ(cstb2023nscq-msX0046).
文摘Anode-free sodium metal batteries hold significant promise for high-energy-density storage but face critical challenges related to sodium deposition dynamics and interfacial instability.Traditional approaches,such as alloy-based current collectors or fluorinated interfaces,often suffer from irreversible volume expansion or corrosive fabrication processes.This study introduces a solvent co-intercalation-mediated in situ sodiophilic interface engineering strategy to overcome these limitations.A graphitized carbon-modified aluminum current collector dynamically regulates interfacial evolution through solvated sodium-ion co-intercalation during initial cycling,prompting the formation of a C-NaF interface with ultralow Na^(+)adsorption energy.This sodiophilic interface not only facilitates uniform sodium nucleation by providing abundant sodium-philic sites but also encourages the preferential decomposition of anions in the electrolyte,leading to the creation of a robust and NaF-rich solid electrolyte interphase.Consequently,the asymmetric half-cell delivers an ultralow nucleation overpotential(9.7 mV at 0.5 mA cm^(-2))and maintains an average coulombic efficiency of 99.8%over 400 cycles at 1 mA cm^(-2).When combined with a Na_(3)V_(2)(PO_(4))_(2)O_(2)F(NVPOF)cathode,the full cell achieves an energy density of 363 Wh kg^(-1) with 80%capacity retention after 250 cycles at 0.5 C.This work integrates molecular-level dynamic interfacial engineering with macroscopic electrochemical stability,providing a scalable industrial solution for next-generation battery systems.
基金supported by National Natural Science Foundation of China(No.11875014)the Natural Science Foundation of Hebei Province(A2017201099)。
文摘Plasma photonic crystals(PPCs)are emerging as a powerful instrument for the dynamical control of the electromagnetic properties of a propagating wave.Here we demonstrate several one-dimensional(1 D)PPCs with uniquely designed superlattice structures,annular structures or with incorporation of the third material into the primitive unit cell.The influences of the properties of the third material as well as the structural configurations of suplerlattices on the transmittance characteristics of PPCs have been investigated by use of the finite element method.The optimal design strategy for producing PPCs that have more and larger band gaps is provided.These new schemes can potentially be extended to 2 D or 3 D plasma crystals,which may find broad applications in the manipulation of microwaves and terahertz waves.
基金supported by the National Key Research and Development Program of China(2016YFB0901503)the Nature Science Foundation of the Jiangsu Higher Education Institutions(No.19KJB150025)+1 种基金the National Natural Science Foundation of China(21875238)the Entrepreneurship and Innovation Program of Jiangsu Province.
文摘MoSe_(2) has been recognized as a promising anode material for lithium/sodium ion batteries due to its unique structure and material properties.Here,hierarchical MoSe_(2)@C hollow nanospheres(MoSe_(2)@C HNSs)assembled with ultrathin nanosheets are prepared via a facile solvothermal method.The MoSe_(2)@C HNS composite is fabricated by an anion-exchange reaction from Mo-glycerate solid spheres combining with the carbonization of glucose.When used as an anode material for LIBs,the MoSe_(2)@C HNS composite manifests a reversible capacity of 711 mA h g^(−1) after 300 cycles under a current density of 500 mA g^(−1).When evaluated as an anode material for SIBs,the MoSe_(2)@C HNS composite delivers a high capacity of 683 mA h g^(−1) at 100 mA g^(−1) and maintains a capacity of 458 mA h g^(−1) after 200 cycles at 200 mA g^(−1).The efficient lithium and sodium ion storage performance should be ascribed to the unique hierarchical hollow nanostructure and synchronously incorporated carbon material.
基金the National Key Research and Development Program of China(2016YFB0901503)Jiangsu Province Natural Science Research of Universities(19KJB150025)+1 种基金the National Natural Science Foundation of China(21875238 and 21831006)Jiangsu Province Innovative and Entrepreneurial Doctor Project(KYQ19021 and KYQ19019)。
文摘Zinc(Zn)has been regarded as the most promising anodematerial for aqueous rechargeable batteries because of itshigh theoretical capacity(820 mA h g^(-1)),moderate elec-trochemical potential(-0.762 V vs.the standard hydro-gen electrode(SHE)),low cost and environmentalfriendliness[1-3].
