Abstract: Sodium chromate (NaCrO2) is a potential cathode material for sodium-ion batteries due to its low cost,safety,and high power.Solid-state reaction has been widely employed as the standard procedure to prepare oxide-type cathode materials for sodium-ion batteries.In this study,NaCrO2 powder is prepared by high-temperature solid-phase reaction method with nano-Cr2O3 and Na2CO3 as feedstocks.The effect of base dosage,solid phase reaction temperature and insulation time on NaCrO2 content are investigated by XRD,and the morphology of NaCrO2 is characterized by means of SEM.It is shown that NaCrO2 is the single reaction product with a purity of 99.69% when the dosage of Na2CO3 is 102% of the theoretical one,the reaction temperature remains at 900℃ and the holding time is 5 h.The obtained NaCrO2 products show a layered structure without obvious agglomeration,with a particle size in the range of 1-80 μm.
袁小超, 唐双全, 范兴木, 刘清华, 王晟懿, 杨丽婷. 高温固相反应法制备亚铬酸钠粉末[J]. 现代化工, 2022, 42(S2): 326-328.
YUAN Xiao-chao, TANG Shuang-quan, FAN Xing-mu, LIU Qing-hua, WANG Sheng-yi, YANG Li-ting. Preparation of sodium chromite powder by high temperature solid phase reaction method. Modern Chemical Industry, 2022, 42(S2): 326-328.
[1] Liang J J,Liu L Y,Liu X S,et al.O3-type NaCrO2 as a superior cathode material for sodium/potassium-ion batteries ensured by high structural reversibility[J].ACS Appl Mater Interfaces,2021,13(19):22635-22645. [2] Gao Y,Wang Z,Lu G,et al.Atomistic understanding of structural evolution,ion transport and oxygen stability in layered NaFeO2[J].Mater Chem A,2019,7:2619-2625. [3] Dunn B,Kamath H,Tarascon J M,et al.Electrical energy storage for the grid:A battery of choices[J].Science,2011,334:928-935. [4] Scrosati B,Garch J.Lithium batteries:Status,prospects and future[J].Power Sources,2010,195:2419-2430. [5] Dai Z,Mani U,Hui T T,et al.Advanced cathode materials for sodium-ion batteries:What determines our choices?[J].Small Methods,2017,1(5):1-26. [6] Wang S,Chen F,Zhu T Y,et al.In situ-formed Cr2O3 coating on NaCrO2 with improved sodium storage performance[J].ACS Appl Mater Interfaces,2020,12(40):44671-44678. [7] Wang P F,Yao H R,Liu X Y,et al.Na+/vacancy disordering promises high-rate Na-ion batteries[J].Sci Adv,2018,4(3):1-9. [8] Wang Q C,Meng J K,Yue X Y,et al.Tuning P2-structured cathode material by Na-site Mg substitution for Na-ion batteries[J].J Am Chem Soc,2019,141:840-848. [9] Cao M H,Shadike Z,Bak S M,et al.Sodium storage property and mechanism of NaCr1/4Fe1/4Ni1/4Ti1/4O2 cathode at various cut-off voltages[J].Energy Storage Mater,2020,24:417-425. [10] Xia X,Dahn J R.NaCrO2 is a fundamentally safe positive electrode material for sodium-ion batteries with liquid electrolytes[J].Electrochem Solid-State Lett,2012,15:2012-2015. [11] Braconnier J J,Delmas C,Hagenmuller P.Etude par desintercalation electrochimique des systemes Na</i>xCrO2 et Na</i>xNiO2[J].Mater Res Bull,1982,17:993-1000. [12] Komaba S,Takei C,Nakayama T,et al.Electrochemical intercalation activity of layered NaCrO2 vs. LiCrO2[J].Electrochem Commun,2010,12:355-358. [13] Yu C Y,Park J S,Jung H G,et al.NaCrO2 cathode for high-rate sodium-ion batteries[J].Energy Environ Sci,2015,8:2019-2026. [14] Bo S H,Li X,Toumar A J,et al.Layered-to-rock-salt transformation in desodiated Na</i>xCrO2(x<0.4)[J].Chem Mater,2016,28:1419-1429. [15] 福永笃史,酒井将一郎,新田耕司,等.亚铬酸钠的制造方法:CN103370277B[P].2015-03-04.
