Li-iyon piller için kalay esaslı grafen kompozit anotun yapısal ve elektrokimyasal karakterizasyonu

Yıl 2017, Cilt: 23 Sayı: 8, 941 - 944, 28.12.2017

Miraç Alaf , Gizem Hatipoğlu Ubeyd Toçoğlu Hatem Akbulut

Öz

Bu
çalışmada, ultrasonik prosesör destekli solüsyon esaslı bir kimyasal yöntem
Li-iyon piller için kalay esaslı grafen kompozit elektrotların sentezi için
geliştirilmiştir. Hummers metodu ile pulcuk grafitten üretilen grafen
tabakaları üzerine SnCl₂.2H₂O başlangıç malzemesi
kullanılarak SnO₂ nanotozları büyütülmüştür. Kompozit elektrotlar
taramalı elektron mikroskobu (SEM), X-ışını difraktometresi ve termal analiz
teknikleri ile karakterize edilmiştir. Üretilen kompozit elektrotlar CR2016
Li-iyon düğme tipi hücreye anot olarak bağlanmış ve şarj-deşarj çevrim testleri
ve çevrimli voltametre analizleri yapılmıştır. Yüksek performanslı kalay esaslı
elektrot malzemesinin hacim genleşmesi problemini aşmak için malzemenin grafen
tabakaları üzerine büyütülmesi ile uzun çevrim ömrü elde edilmiştir. Tek adımda
üretilen SnO₂-grafen nanokompozitinden hazırlanan
elektrottan 100 çevrim sonunda 385 mAhg^-1 değerinde spesifik
kapasite elde edilmiştir.

Anahtar Kelimeler

Kalay oksit, Grafen, Ultrasonik destekli, Li-iyon pil

Structural and electrochemical characterization of tin based graphene composite anode for li-ion batteries

Öz

In
this study, ultrasound assisted solution based chemical synthesis method has
been developed to synthesize tin based graphene composite electrodes for Li-ion
batteries. SnO₂ was grown by using SnCl₂.2H₂O
precursor material on graphene layers was produced Hummers method by using
flake graphite. The composite electrodes were characterized with scanning
electron microscopy (SEM), X-ray diffractometer and thermal analysis methods.
The produced composite electrodes were connected to CR2016 button cells as
anode and carried out charge-discharge and cyclic voltammeter tests. Long cycle
life was achieved by growing tin based electrode materials with high
performance on graphene layers to overcome volume expansion problem. The
electrode prepared one-step synthesized SnO₂-graphene nanocomposite
has shown 385 mAhg^-1 specific capacity value after 100
cycles.

Anahtar Kelimeler

Tin oxide, Graphene, Ultrasound assisted, Li-ion battery

Kaynakça

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