Shan Fang

Nanchang University · School of Materials Science and Engineering

Lithium metal is a highly promising anode for next‐generation high‐energy‐density rechargeable batteries. Nevertheless, its practical application faces challenges due to the uncontrolled lithium dendrites growth and infinite volumetric expansion during repetitive cycling. Herein, a composite lithium anode is designed by mechanically rolling and pre...

Si-based anode materials have a relatively high theoretical specific capacity and low operating voltage, greatly enhancing the energy density of rechargeable lithium-ion batteries (LIBs). However, their practical application is seriously hindered by the instability of active particles and anode electrodes caused by the huge swelling during cycling....

Fe2O3 with high theoretical capacity (1007 mA h g⁻¹) and low cost is a potential anode material for lithium‐ion batteries (LIBs), but its practical application is restricted by its low electrical conductivity and large volume changes during lithiation/delithiation. To solve these problems, Fe2O3@Ti3C2Tx composites were synthesized by a mussel‐like...

Ionic liquids (ILs) are promising electrolyte candidates for high‐safety and stability lithium metal batteries. However, their practical application is hindered by high viscosity resulting in a poor wettability of separator and sluggish Li⁺ transport at room temperature. Herein, a weakly‐solvating solvent of methyl (2,2,2‐trifluoroethyl) carbonate...

Low Coulombic efficiency and significant capacity decay resulting from an unstable solid electrolyte interphase (SEI) and dendritic growth pose challenges to the practical application of lithium‐metal batteries. In this study, a highly efficient protection layer induced by octaphenylsilsesquioxane (OPS) with LiFSI salt is investigated. The OPS exhi...

Germanium (Ge) has a high specific capacity when used as an alloying anode in lithium-ion batteries. However, a large volume of expansion that occurs during charging and discharging hampers its practical applications. In order to improve the stability of the alloying anode, a three-dimensional (3D) germanium/carbon porous composite was produced. In...

The aqueous processing of lithium transition metal oxides into battery electrodes is attracting a lot of attention as it would allow for avoiding the use of harmful N-methyl-2-pyrrolidone (NMP) from the cell fabrication process and, thus, render it more sustainable. The addition of slurry additives, for instance phosphoric acid (PA), has been prove...

Lithium batteries occupy the large‐scale electric mobility market raising concerns about the environmental impact of cell production, especially regarding the use of poly(vinylidene difluoride) (teratogenic) and N‐methyl‐2‐pyrrolidone (NMP, harmful). To avoid their use, an aqueous electrode processing route is utilized in which a water‐soluble hybr...

The poorly flammable room‐temperature ionic liquid‐based electrolyte composed of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and N‐butyl‐N‐methylpyrrolidinium bis(fluorosulfonyl)imide (Pyr14FSI) with fluoroethylene carbonate (FEC) as an additive is investigated towards its compatibility with the LiNi0.88Co0.09Mn0.03O2 (NCM88) cathode and a...

Lithium‐ion batteries with outstanding energy and power density have been extensively investigated in recent years, rendering them the most suitable energy storage technology for application in emerging markets such as electric vehicles and stationary storage. More recently, sodium, one of the most abundant elements on the earth, exhibiting similar...

Nitrile‐based electrolytes with high‐voltage have emerged as attractive candidates for high energy intensive lithium‐metal batteries (LMBs). But they are still hampered by the inherent instability of reductive lithium anodes. Herein, we propose a fully methylated pivalonitrile (PN) as a stable electrolyte solvent for LMBs. This nitrile‐based electr...

The lithium metal anode is regarded as ideal for high-energy rechargeable batteries. Unfortunately, the uncontrolled lithium dendritic growth and the infinite volume expansion upon cycling result in low Coulombic efficiency, fast capacity decay and safety issues. Herein, a mismatch electrical-conductivity framework has been designed as a stable hos...

Lithium metal is considered as the ultimate negative electrode for future high-energy batteries because of its lowest electrode potential and very high theoretical capacity. However, its practical application is severely plagued by the hazardous lithium dendritic growth upon charge and low coulombic efficiency resulting from the inhomogeneous mass...

High-energy-density lithium-metal batteries face the challenge of developing functional electrolytes enabling both the stabilization of the lithium-metal negative electrode and high-voltage positive electrodes (> 4 V versus Li⁺/Li). Herein, a low-volatility and non-flammable ionic liquid electrolyte (ILE) incorporating two anions, bis(fluorosulfony...

FSI⁻‐based ionic liquids (ILs) are promising electrolyte candidates for long‐life and safe lithium metal batteries (LMBs). However, their practical application is hindered by sluggish Li⁺ transport at room temperature. Herein, it is shown that additions of bis(2,2,2‐trifluoroethyl) ether (BTFE) to LiFSI‐Pyr14FSI ILs can effectively mitigate this sh...

Owing to its high specific capacity and abundant reserves, silicon has been considered as a promising anode material for future lithium storage. However, its cycle life is seriously hindered by the huge volume variation and low conductivity. Therefore, it is crucial to effectively and easily prepare silicon anode with excellent performance. Herein,...

Fabricating of stable dendrite-free Li metal anode, accommodating infinite volume changes is urgent for the development of advanced lithium metal batteries. Herein, hosting lithium into a self-supported TiN nanorod arrays with high-surface-area, electrical conductivity, and porous structure forming integrated Li/TiN/Carbon textile anode (LTNC) is f...

Lithium‐ion batteries (LIBs) with outstanding energy and power density have been extensively investigated in recent years, rendering them the most suitable energy storage technology for application in emerging markets such as electric vehicles and stationary storage. More recently, sodium, one of the most abundant elements on earth, exhibiting simi...

Enhanced solid-state ionic diffusion for high-power Na-ion and K-ion hybrid capacitors (SIHCs and PIHCs) is usually attained via tailoring anode materials to the nanoscale, which inevitably requires costly preactivation processes for practical applications. As an alternative to nanoscaling, herein, we propose SIHC and PIHC prototypes exploiting mic...

Despite silicon is considering one of the most promising anode materials in next‐generation lithium‐ion batteries, large volumetric expansion during cycling hampers its practical applications. Fabrication of silicon/carbon composites is an effective way to improve its electrical conductivity and inhibit electroactive material delaminating from curr...

The current insertion anode chemistries are approaching their capacity limits, thus alloying reaction anode materials with high theoretical specific capacity are investigated as potential alternative for lithium ions batteries. However, their performance is far from being satisfactory because of large volume change and severe capacity decay occurri...

Lithium metal is considered to be one of the most potential anode material on account of its high theoretical specific capacity and lowermost electrochemical potential. Nevertheless, the critical challenges of dendrites growth and low Coulomb efficiency (CE) of the lithium metal anode during the cycling prevent the commercial application of the lit...

A highly graphitized carbon on a silicon monoxide (SiO) surface coating at low temperature, based on polymer precursor π–π stacking, was developed. A novel conductive and electrochemically stable carbon coating was rationally designed to modify the SiO anode materials by controlling the sintering of a conductive polymer, a pyrene-based homopolymer...

Hybrid ion capacitors have been considered as a very attractive energy source with high energy density and power density since it combines both merits of lithium ion batteries and supercapacitors. However, their commercial application has been limited by the mismatch of charge-storage capacity and electrode kinetics between the capacitor-type catho...

Structural design is an effective avenue to alleviate the volume expansion of silicon anode. Surface coating and/or encapsulation shows a significant advantage. However, most coating layer shows a poor mechanical strength, resulting in fast fading electrochemical performance. In this article, commercial silicon nanoparticles coated with polyimide (...

Although the soluble redox mediator (RM) has been effectively applied in Li-O2 batteries, parasitic reactions between the lithium anode and RM+ can result in poor cycle performance. Herein, we proposed a non-electroactive surfactant (sodium dodecyl sulfate, SDS) that could adsorb on the hydrophobic carbon surface and form a stable anionic layer on...

Adjusting the particle size and nanostructure or applying carbon materials as the coating layers are promising to hold the volume expansion of Si in order for its practical application in lithium ion batteries (LIBs). Herein, the mild carbon-coating combined with a molten salt reduction is precisely designed to synthesize a raspberry-like hollow Si...

Polythiophene-coated porous silicon core–shell nanospheres (Si@PTh) composite are synthesized by a simple chemical oxidative polymerization approach. The polythiophene acts as a flexible layer to hold silicon grains when they are repeatedly alloying/dealloying with lithium during the discharge/charge process. The long lifespan and high-current-dens...

In this study, a relatively simple and direct method is used to prepare germanium nanoparticles (Ge NPs) embedded in the pore tunnels of an N-doped mesoporous carbon matrix. In the Ge/CMK-3 nanocomposite, the highly ordered porous structure and large pore volume guarantee a sufficient Ge loading and buffer the large volume changes of Ge during the...

Hybrid supercapacitors are one very appealing power source with high energy density and power density because they employ both the merits of lithium ion batteries and supercapacitors. To balance such hybrid systems, the rate for the redox component must be substantially comparative to the levels of the double layer process. Taking this issue for th...

In this work, TiN NWs supported silicon nanorods (TiN@Si NRs) are produced via direct radio frequency (RF) magnetron sputtering of Si deposition onto the surface of TiN NWs. Due to the superior mechanical stability and electrical conductivity of TiN, it provides more stable support and better conductive pathways for Si when compared with TiO2. The...

Room-temperature rechargeable sodium-ion batteries (SIBs) are receiving increasing attention for upcoming large-scale applications in smart grid and electric vehicles due to the earth abundance and low cost of sodium. 1, 2 However, Na ion has a larger radius of 1.02 Å (~55% larger than Li ⁺ , 0.76 Å) and three times heavier than lithium (23 g mol ⁻...

Silicon has a large specific capacity which is an order of magnitude beyond that of conventional graphite, making it a promising anode material for lithium ion batteries. However, the large volume changes (~300%) during cycling caused material pulverization and instability of the solid-electrolyte interphase resulting in poor cyclability which prev...

A Ge–graphene–carbon nanotube composite electrode was constructed by germanium (Ge) nanoparticles anchored on reduced graphene oxide (Ge–RGO) intertwined with carbon nanotubes (CNT). In this unique structure, the graphene sheets improve the electrical conductivity and buffer severe volume changes. Additionally, the CNT mechanically binds together w...

As a competitor for Li4Ti5O12 with a higher capacity and extreme safety, monoclinic TiNb2O7 has been considered as a promising anode material for next-generation high power lithium ion batteries. However, TiNb2O7 suffers from low electronic conductivity and ionic conductivity, which restricts the electrochemical kinetics. Herein, a facile and advan...

Three-dimensional (3D) titanium dioxide@germanium (TiO2@Ge) core–shell nanorod arrays on carbon textiles are fabricated by a facile two-step method and further investigated as flexible electrode for Li-ion batteries (LIBs). The synthesis of TiO2@Ge composite involves the hydrothermal growth of TiO2 nanorod arrays on carbon textiles and a subsequent...

A hydrogenated TiO2–reduced-graphene oxide (H-TiO2–RGO) nanocomposite is synthesised via a facile one-pot hydrogenation treatment process. The morphologies and structures are characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). The nitrogen adsorption–desorption isotherms revealed that the H-TiO2–RGO exhibited large...

A unique core-shell structure of silicon@titania (Si@TiO2) composite with silicon nanoparticles encapsulated in TiO2 hollow spheres is synthesized by a simple hydrolysis method combined with magnesiothermic reduction method. It is found that the TiO2 shell is effective for improving the electrical conductivity and structural stability. More importa...

Here, germanium (Ge) nanofilm as the high-capacity electrode was deposited on the three-dimensional porous nickel foam substrate by radio frequency sputtering. Then, cyclized-polyacrylonitrile (PAN) was coated on the surface of Ge nanofilm to get the excellent rate capability and cycle stability owing to the poor cycle life of the as-prepared Ge na...