Li/Li sub 1+x V sub 3 O sub 8 secondary batteries; Synthesis and characterization of an amorphous form of the cathode

Journal Article · Wed Aug 01 00:00:00 EDT 1990 · Journal of the Electrochemical Society; (USA)

DOI:https://doi.org/10.1149/1.2086945· OSTI ID:6527255

Pistoia, G ^[1]; Pasquali, M ^[2]; Wang, G ^[3]; Li, L ^[4]

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1. Centro di Studio per la Elettrochimica e la Chimica Fisica delle Interfasi, C.N.R., Via Castro Laurenziano 7, Rome (IT)
2. Dipt. ICMMPM, Facolta di Ingegneria, Univ. di Roma La Sapienza, Rome (IT)
3. Inst. of Physics, Chinese Academy of Sciences, Beijing (CN)
4. Beijing Univ. of Science and Technology, Beijing (CN)

This paper reports a new synthesis route applied to obtain Li{sub 1+x}V{sub 3}O{sub 8}. Instead of the conventional high-temperature technique leading to the crystalline form, a solution technique producing the amorphous form has been used. This material, after dehydration, shows an electrochemical performance exceeding that of the crystalline one. The rationale for this behavior mainly lies in the microscopic factors, i.e., in the possibility for the unit cell of amorphous Li{sub 1+x}V{sub 3}O{sub 8} to insert up to 9 Li{sup +}, instead of six for crystalline Li{sub 1+x}V{sub 3}O{sub 8}. Furthermore, the absence of a long-range crystallographic order reduces the length of the pathways through which Li{sup +} ions diffuse. This and the favorable morphology endow amorphous Li{sub 1+x}V{sub 3}O{sub 8} with a high rate capability. The higher energy content afforded by this new form (theoretical value, 935 Wh/kg, based on the electrodes weight) can be exploited in long-cycling cells at high rates.

• OSTI ID: 6527255
• Journal Information: Journal of the Electrochemical Society; (USA), Vol. 137:8; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CATHODES
AMORPHOUS STATE
ELECTROCHEMICAL CELLS
PERFORMANCE
LITHIUM IONS
DIFFUSION
CRYSTALLOGRAPHY
VANADIUM OXIDES
CHALCOGENIDES
CHARGED PARTICLES
ELECTRODES
IONS
OXIDES
OXYGEN COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
250902* - Energy Storage- Batteries- Performance & Testing
400400 - Electrochemistry
250903 - Energy Storage- Batteries- Materials
Components
& Auxiliaries