The Li metal anode has long been considered as one of the most ideal anodes due to its high energy density. However, safety concerns, low efficiency, and huge volume change are severe hurdles practical application anodes, especially in case areal capacity. Here it is shown that graphitized carbon fibers (GCF) electrode can serve a multifunctional 3D current collector enhance storage GCF store amount via intercalation electrodeposition reactions. as‐obtained deliver an capacity 8 mA h cm −2...

A subzero-temperature cathode material is obtained by nucleating cubic prussian blue crystals at inhomogeneities in carbon nanotubes. Due to fast ionic/electronic transport kinetics even -25 °C, the shows an outstanding low-temperature performance terms of specific energy, high-rate capability, and cycle life, providing a practical sodium-ion battery powering electric vehicle frigid regions.

Li anodes have been rapidly developed in recent years owing to the rising demand for higher-energy-density batteries. However, safety issues induced by dendrites hinder practical applications of anodes. Here, metal stabilized regulating lithium plating/stripping vertically aligned microchannels are reported. The current density distribution and morphology evolution deposits on porous Cu collectors systematically analyzed. Based simulations COMSOL Multiphysics, tip effect leads preferential...

The fast-ionic-conducting ceramic electrolyte is promising for next-generation high-energy-density Li-metal batteries, yet its application suffers from the high interfacial resistance and poor stability. In this study, compatible solid-state was designed by coating Li1.4Al0.4Ti1.6(PO4)3 (LATP) with polyacrylonitrile (PAN) polyethylene oxide (PEO) oppositely to satisfy deliberately disparate interface demands. Wherein, upper PAN constructs soft-contact LiNi0.6Mn0.2Co0.2O2, lower PEO protects...

The uncontrolled growth of Li dendrites upon cycling might result in low coulombic efficiency and severe safety hazards. Herein, a lithiophilic binary lithium-aluminum alloy layer, which was generated through an situ electrochemical process, utilized to guide the uniform metallic nucleation growth, free from formation dendrites. Moreover, formed LiAl layer can function as reservoir compensate irreversible loss, enabling long-term stability. protected electrode shows superior over 1700 h...

Metallic lithium affords the highest theoretical capacity and lowest electrochemical potential is viewed as a leading contender an anode for high-energy-density rechargeable batteries. However, poor wettability of molten does not allow it to spread across surface lithiophobic substrates, hindering production application this anode. Here we report general chemical strategy overcome dilemma by reacting with functional organic coatings or elemental additives. The Gibbs formation energy newly...

Safety concerns are impeding the applications of lithium metal batteries. Flame-retardant electrolytes, such as organic phosphates electrolytes (OPEs), could intrinsically eliminate fire hazards and improve battery safety. However, OPEs show poor compatibility with Li though exact reason has yet to be identified. Here, plating process in Li/OPEs interface chemistry were investigated through ex situ techniques, cause for this incompatibility was revealed highly resistive inhomogeneous...

All-solid-state batteries are intensively investigated, although their performance is not yet satisfactory for large-scale applications. In this context, the combination of Li10GeP2S12 solid electrolyte and LiNi1-x-yCoxMnyO2 positive electrode active materials considered promising despite unsatisfactory battery induced by thermodynamically unstable electrode|electrolyte interface. Here, we report electrochemical spectrometric studies to monitor interface evolution during cycling understand...

Comprehensive analysis of all-solid-state cells with NCM85 and a Li-M-Cl catholyte reveals the vital role central cation M in controlling composition cathode interphase dictating capacity retention above 4.3 V.

We report two new families of lithium metal chloride solid electrolytes Li3–xZrx(M)1–xCl6 (0 ≤ x 0.8; M = Ho or Lu) with ionic conductivities up to 1.8 mS cm–1 and a low activation energy 0.34 eV. Structural elucidation via high-resolution neutron diffraction determines the Li ion distribution in trigonal Li3HoCl6, orthorhombic-I Li3LuCl6, orthorhombic-II Li2.4Zr0.6(Ho/Lu)0.4Cl6. The last compound exhibits well-connected Li-ion pathways abundant carriers/vacancies promote diffusion....

Abstract Layered O3‐type sodium oxides (NaMO 2 , M=transition metal) commonly exhibit an O3–P3 phase transition, which occurs at a low redox voltage of about 3 V (vs. Na + /Na) during extraction and insertion, with the result that almost 50 % their total capacity lies this region, they possess insufficient energy density as cathode materials for sodium‐ion batteries (NIBs). Therefore, development high‐voltage cathodes remains challenging because it is difficult to raise phase‐transition by...

Li metal anodes, which have attracted much attention for their high specific capacity and low redox potential, face a great challenge in realizing practical application. The fatal issue of dendrite formation gives rise to internal short circuit safety hazards needs be addressed. Here we propose rational strategy trapping within microcages confine the deposition morphology suppress growth. Microcages with carbon nanotube core porous silica sheath were prepared proved effective controlling...

Abstract Herein, a composite polymer electrolyte with viscoelastic and nonflammable interface is designed to handle the contact issue preclude Li dendrite formation. The (cellulose acetate/polyethylene glycol/Li 1.4 Al 0.4 Ti 1.6 P 3 O 12 ) exhibits wide electrochemical window of 5 V (vs + /Li), high transference number 0.61, an excellent ionic conductivity above 10 −4 S cm −1 at 60 °C. In particular, intimate contact, low interfacial impedance, fast ion‐transport process between electrodes...

Abstract Solid polymer electrolytes (SPEs) are promising candidates for developing high‐energy‐density Li metal batteries due to their flexible processability. However, the low mechanical strength as well inferior interfacial regulation of ions between SPEs and anode limit suppress ion dendrites destabilize anode. To meet these challenges, engineering aiming homogenize distribution + /electron accompanied with enhanced by Mg 3 N 2 layer decorating polyethylene oxide is demonstrated. The...

Abstract Unstable electrode/solid‐state electrolyte interfaces and internal lithium dendrite penetration hamper the applications of solid‐state lithium‐metal batteries (SSLMBs), underlying mechanisms are not well understood. Herein, in situ optical microscopy provides insights into plating/stripping processes a gel polymer reveals its dynamic evolution. Spherical deposits evolve moss‐like branch‐shaped dendrites with increasing current densities. Remarkably, on‐site‐formed solid interphase...

Lithium argyrodite-type electrolytes are regarded as promising due to their high ionic conductivity and good processability. Chemical modifications increase have already been demonstrated, but the influence of these on interfacial stability remains so far unknown. In this work, we study Li

Sulfide-based electrolytes and Ni-rich cathode materials (i.e., LiNixCoyMn1–x–yO2, x ≥ 0.8) are considered as promising for high-performance solid-state batteries. However, their poor chemical compatibility causes stability issues fast capacity fading, particularly at high potentials. Here, we propose a coating concept inspired by the natural cathode–electrolyte interphase (CEI) formation to overcome degradation solid electrolyte–cathode active material interface. An artificial CEI (coating)...

Organic/inorganic interfaces greatly affect Li+ transport in composite solid electrolytes (SEs), while SE/electrode interfacial stability plays a critical role the cycling performance of solid-state batteries (SSBs). However, incomplete understanding (in)stability hinders practical application SEs SSBs. Herein, chemical degradation between Li6 PS5 Cl (LPSCl) and poly(ethylene glycol) (PEG) is revealed. The high polarity PEG changes electronic state structural bonding PS43- tetrahedra, thus...

Developing high-voltage layered cathodes for sodium-ion batteries (SIBs) has always been a severe challenge. Herein, new family of honeycomb-layered Na3Ni1.5M0.5BiO6 (M = Ni, Cu, Mg, Zn) with monoclinic superstructure shown to combine good Na+ (de)intercalation activity competitive 3.3 V high voltage. By coupling the electrochemical process ex situ X-ray absorption spectroscopy as well in diffraction, charge compensation mechanism and structural evolution these are clearly investigated....

Abstract The uncontrolled growth of Li dendrites upon cycling might result in low coulombic efficiency and severe safety hazards. Herein, a lithiophilic binary lithium–aluminum alloy layer, which was generated through an situ electrochemical process, utilized to guide the uniform metallic nucleation growth, free from formation dendrites. Moreover, formed LiAl layer can function as reservoir compensate irreversible loss, enabling long‐term stability. protected electrode shows superior over...