Figure 4b. Specific capacity vs. cycle number of nanocrystalline tin nitride in a Na half-cell at 200 mA g-1									
Cycle number	Reduction specific capacity (mA h g-1)	Oxidation specific capacity (mA h g-1)	Efficiency						
1	1374.98907	409.05733	29.74986						
2	511.38499	389.92943	76.24968						
3	471.10966	400.05238	84.91704						
4	460.22559	403.91473	87.76451						
5	441.82316	405.36292	91.74778						
6	439.06266	407.64197	92.84369						
7	437.50121	412.00684	94.17273						
8	439.87101	417.45779	94.90459						
9	443.82774	423.92633	95.51596						
10	443.90039	419.17717	94.43046						
11	441.42688	423.69298	95.9826						
12	443.56959	426.92339	96.24722						
13	446.19061	428.76559	96.09471						
14	446.04417	430.57969	96.53297						
15	450.43878	431.97402	95.90072						
16	445.5648	431.181	96.77178						
17	446.96094	433.86061	97.06902						
18	449.83822	437.68112	97.29745						
19	454.21389	440.68657	97.02182						
20	450.78921	433.69083	96.20701						
21	448.82727	437.71793	97.52481						
22	452.69399	441.41533	97.50855						
23	456.21771	439.74954	96.39028						
24	447.98068	436.19532	97.36923						
25	448.45957	437.68164	97.59668						
26	450.58148	440.73168	97.81398						
27	454.00226	444.11121	97.82137						
28	450.15335	432.88793	96.16455						
29	443.7914	434.38151	97.87966						
30	446.72112	436.75031	97.768						
31	446.71927	437.73307	97.9884						
32	444.94475	431.01441	96.8692						
33	440.5294	431.79845	98.01808						
34	441.65689	431.25728	97.64532						
35	439.87668	430.18601	97.79696						
36	439.85138	430.78526	97.93882						
37	439.08935	429.78116	97.88012						
38	438.00753	427.54884	97.61221						
39	436.79793	428.24431	98.04174						
40	435.52904	424.69935	97.51344						
41	433.25315	423.87258	97.83485						
42	432.20224	422.22196	97.69083						
43	435.11429	426.27487	97.96848						
44	434.71431	424.99601	97.76444						
45	432.31083	421.39076	97.47402						
46	429.10123	420.23851	97.93458						
47	428.04997	418.98129	97.8814						
48	426.02441	416.53842	97.77337						
49	424.71804	416.37994	98.03679						
50	421.99944	413.29121	97.93644						
