e-journal

Novel approach to preparation of LiMn2O4 core/LiNixMn2-xO4 shell composite

---

Abstract.
Combining two methods, coating and doping, tomodify spinel LiMn2O4, is a novel approach we used to
synthesize active material. First we coated the LiMn2O4 particles with the nickel oxide particles by
means of homogenous precipitation, and then the nickel oxide-coated LiMn2O4 was calcined at 750 8C
to form a LiNixMn2-xO4 shell on the surface of spinel LiMn2O4 particles. Scanning electron microscopy
(SEM), Transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray
diffraction (XRD), cyclic voltammetry (CV) and charge–discharge test were performed to characterize
the spinel LiMn2O4 before and after modification. The experimental results indicated that a spinel
LiMn2O4 core is surrounded by a LiNixMn2-xO4 shell. The resulting composite showed excellent
electrochemical cycling performance with an average fading rate of 0.014% per cycle. This improved
cycle stability is greatly attributed to the suppression of Jahn–Teller distortion on the surface of spinel
LiMn2O4 particles during cycling.

Keywords: Spinel LiMn2O4, Core, Shell, Jahn–Teller distortion

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

Applied Surface Science

No. Panggil

-

Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Applied Surface Science 255 (2009) 5651–5655

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

KIMIA

Info Detail Spesifik

-

Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar