Residual alkali-evoked cross-linked polymer layer for anti-air-sensitivity LiNi_(0.89)Co_(0.06)Mn_(0.05)O_(2)cathode

High-energy density lithium-ion batteries(LIBs)with layered high-nickel oxide cathodes(LiNi_(x)Co_(y)Mn_(1-x-y)O_(2),x≥0.8)show great promise in consumer electronics and vehicular applications.However,LiNi_(x)Co_(y)Mn_(1-x-y)O_(2)faces challenges related to capacity decay caused by residual alkalis owing to high sensitivity to air.To address this issue,we propose a hazardous substances upcycling method that fundamentally mitigates alkali content and concurrently induces the emergence of an anti-air-sensitive layer on the cathode surface.Through the neutralization of polyacrylic acid(PAA)with residual alkalis and then coupling it with 3-aminopropyl triethoxysilane(KH550),a stable and ion-conductive cross-linked polymer layer is in situ integrated into the LiNi_(0.89)Co_(0.06)Mn_(0.05)O_(2)(NCM)cathode.Our characterization and measurements demonstrate its effectiveness.The NCM material exhibits impressive cycling performance,retaining 88.4%of its capacity after 200 cycles at 5 C and achieving an extraordinary specific capacity of 170.0 mA h g^(-1) at 10 C.Importantly,this layer on the NCM efficiently suppresses unfavorable phase transitions,severe electrolyte degradation,and CO_(2)gas evolution,while maintaining commendable resistance to air exposure.This surface modification strategy shows widespread potential for creating air-stable LiNi_(x)Co_(y)Mn_(1-x-y)O_(2)cathodes,thereby advancing high-performance LIBs.

Research Progress in the Treatment of Poststroke Depression with Traditional Chinese Medicine

In recent years,the incidence rate of stroke has increased year by year.Post stroke depres‐sion is one of its main complications,which seriously affects the recovery of physiological functions and quality of life of stroke patients.Traditional Chinese medicine has signifi‐cant therapeutic effects in treating this disease.This article provides a classification and review of traditional Chinese medicine treatment methods for post-stroke depression,and looks forward to the current problems.

Growth mechanisms for spherical Ni_(0.815)Co_(0.15)Al_(0.035)(OH)_(2) precursors prepared via the ammonia complexation precipitation method

The microstructures of precursors strongly affect the electrochemical performance of Ni-rich layerstructured cathode materials.In this study,the growth behaviour of Ni_(0.815)Co_(0.15)Al_(0.035)(OH)_2(NCA) prepared via the ammonia complexation precipitation method in a 50-L-volume continuously stirred tank reactor(CSTR) is studied in detail.The growth of Ni(OH)2-based hydroxide can be divided into a nucleation process,an agglomeration growth process,a process in which multiple growth mechanisms coexist,and an interface growth process over time,while the inner structure of the CSTR can be divided into a nucleation zone,a complex dissolution zone,a growth zone,and a maturation zone.The concentration of ammonium ions affects the growth habit of the primary crystal significantly due to its specific adsorption on the electronegative crystal plane.When the ammonia concentration is <1.5 mol L^(-1) at 60℃ at pH=11.5,the precursors grow preferentially along the(1 0 1) crystal plane,whereas they grow preferentially along the(0 0 1) crystal plane when the concentration is >2.0 mol L^(-1).The LiNi_(0.815)Co_(0.15)Al_(0.035)O_2 materials inherit the grain structure of the precursor.Materials prepared from precursors with(1 0 1)preferential primary particles show a higher specific capacity and better rate performance than those that were prepared from(0 0 1) preferential primary particles,but the latter realize a better cycling performance than the former.

Non-solvating fluorosulfonyl carboxylate enables temperature-tolerant lithium metal batteries

Advanced electrolyte engineering is an important strategy for developing high-efficacy lithium(Li)metal batteries(LMBs).Unfortunately,the current electrolytes limit the scope for creating batteries that perform well over temperature ranges.Here,we present a new electrolyte design that uses fluorosulfonyl carboxylate as a non-solvating solvent to form difluoroxalate borate(DFOB-)anion-rich solvation sheath,to realize high-performance working of temperature-tolerant LMBs.With this optimized electrolyte,favorable SEI and CEI chemistries on Li metal anode and nickel-rich cathode are achieved,respectively,leading to fast Li^(+)transfer kinetics,dendrite-free Li deposition and suppressed electrolyte deterioration.Therefore,Li||LiNi_(0.80)Co_(0.15)Al_(0.05)O_(2)batteries with a thin Li foil(50μm)show a long-term cycling lifespan over 400 cycles at 1C and a superior capacity retention of 90%after 200 cycles at 0.5C under 25℃.Moreover,this electrolyte extends the operating temperature from-10 to 30℃and significantly improve the capacity retention and Coulombic efficiency of batteries are improved at high temperature(60℃).Fluorosulfonyl carboxylates thus have considerable potential for use in high-performance and allweather LMBs,which broadens the new exploring of electrolyte design.